"Post-COVID conditions can include a wide range of ongoing health problems," the CDC states. People with mild to moderate cases of COVID-19 are thought to be contagious for up to 10 days. regularly washing hands with soapy water or alcohol-based hand gels. SoI would not consider you contagious.". By setting 14 days for the self-quarantine . Learn more about the transmission of SARS-CoV-2 here. Researchers at Imperial College London . People typically experience symptoms around 45 days after infection. The new guidelines mean that some people may leave isolation while they are still infectious, even if most transmission risk is gone after five days. If a person develops symptoms, the clock resets to day 0 and the isolation period restarts. Read on to find out more about how and when COVID-19 is contagious, and how to treat and prevent the infection. Summary: A new study has found that individuals infected with the COVID-19 virus are most contagious two days before, and three days after, they develop . "The most common symptom that signifies healing is a lingeringcoughbecause coughing is your lungs way of sweeping out dead cells," he said. If you're not sure what "fully vaccinated" means these days, our guide can help. People should wear cloth face masks while continuing to practice physical distancing. Some people may have the coronavirus and never show symptoms. People should follow isolation guidelines and never assume that an absence of symptoms means an absence of COVID-19. Their other symptoms of COVID-19 are improving. "But that's where that strict, five-day masking requirement comes in," Stuopis stresses. COVID-19. When researchers set out to learn the incubation period for the original strain of the coronavirus, they studied dozens of confirmed cases reported between Jan. 4 and Feb. 24, 2020. Centers for Disease Control and Prevention. After five days of symptoms or a positive COVID-19 test, about 31% of people are still contagious. Regardless of symptoms, those who test positive are advised to take specific precautions for at least 10 days. Nevertheless, a caregiver can reduce their exposure by taking the following precautions: It may also be helpful to prepare for the possibility of illness. However, some people may develop no symptoms at all. According to the Centers for Disease Control and Prevention, COVID symptoms can appear anywhere from two to 14 days after someone is exposed to the virus. This is why COVID-19 outbreaks are so hard to contain. On average, people are contagious for 5 to 10 days. A study from Japan found that people with the Omicron variant shed the virus for longer after symptoms appear. The virus can lead to more severe illness, including pneumonia and death, for some. But when will you know whether you have the disease? Boston University School of Medicine. Early mild symptoms, like excessive coughing, sore throat, fatigue, headache, or fever, should not be ignored. Also, avoid visiting vulnerable people during the period after isolation when a person may still be able to transmit the virus. WHO states that people who have COVID-19 without symptoms can still transmit the virus. To reporters & others writing about You can learn more about how we ensure our content is accurate and current by reading our. People who have had severe symptoms of COVID-19 may need to isolate for up to 20 days after they first noticed them. With the. MNT is the registered trade mark of Healthline Media. Wear a high-quality mask if you must be around others at home and in public. In high-risk settings, they may be considered infectious from 72 hours before symptoms start. How long does coronavirus last in the body, air, and in food? A 2020 review of data from 5,340 people with SARS-CoV-2 infections suggested that people are most contagious within the first week of illness. For example, people who develop symptoms are more likely to spread the virus because they have a higher viral load than those who have COVID-19 without symptoms. But experts warn that the coming wave - caused by a mutant called BA.2that's thought to be . A person with a weakened immune system who has had a COVID-19 infection may need to isolate for 20 days or more. According to their data, about 5 percent of people who tested positive for COVID are still infectious after 10 days of self-isolation. The SARS-CoV-2 infection that causes COVID-19 can be contagious for around 2 weeks, but the exact duration varies from person to person. According to the CDC, the most common long symptoms include: Guidelines state those who were exposed should watch for symptoms until at least 10 days after the last close contact with someone who had COVID. Anyone who has been hospitalized to treat COVID-19 should talk with their doctor before ending isolation. "Nobody's saying that there aren't some people, maybe statistically speaking at the end of the tail, who might transmit after Day 10," said Peter Chin-Hong, an infectious disease specialist at the University of California, San Francisco. Choose a sick room or a separate area to stay in, and use a different bathroom if possible. In rare cases, symptoms can show up after 14 days. Wear a well-fitting mask for at least five days following your initial five days of quarantine, and as always, practice good hand hygiene. The best method of preventing the spread of SARS-CoV-2 is to self-isolate and follow all government guidelines following a possible infection. Some of this initial advice may have stemmed from the fact that after you've had COVID-19, it can still be detectable in the upper respiratory tract for up to three months, per the Centers for Disease Control and Prevention (CDC). Testing may be an option to reduce the isolation period. Are they still infectious? Taking precautions such as wearing a face mask, improving indoor ventilation, and moving indoor activities outdoors can greatly reduce the risk of further spread. If a person develops severe symptoms such as the following, they should get medical help: Learn what to do if a person develops COVID-19 symptoms here. Vaccines: The CDC recommends that everyone age 5 and older get an updated covid booster shot. For the Omicron variant, the incubation period is 1 to 4 days. Health experts recommend rapid antigen tests over PCR tests because they can detect high viral loads and are thought to be more reliable in telling people whether or not they could still be contagious. As of March 2022, the CDC recommends that if you've tested positive or have symptoms of COVID-19, regardless of your vaccination status, you should stay home for at least five days and isolate yourself from other people in your household. However, for others, COVID-19 causes life threatening organ failure. Here, learn more about the incubation period and when to call a. Your body will also shed the virus earlier. They found that 80% of those who had COVID-19 symptoms tested positive on day five. Omicron is more contagious than the Delta variant. some people infected with COVID may be contagious for longer than 10 days. All rights reserved. Therapeutic management of hospitalized adults with COVID-19. Are you infectious if your test is Pos but its been 5 or 10 days? COVID-19 Symptoms Day-by-Day + Day 1 to 3: Incubation Period. The length of time it takes a person to recover from COVID-19 depends on many factors, including whether or not they develop symptoms, how severe any symptoms are, and whether or not they have any other medical conditions. The agency says most of the transmission occurs early on in . Our website services, content, and products are for informational purposes only. If a person does not have symptoms but later develops them, they are pre-symptomatic before they experience the symptoms. In addition, about 97% of people who contract the virus will show symptoms within 11 days. This is when people with COVID-19 are at their most contagious. Choose to not go to the bar until Neg For some, that may mean still testing positive at 10 days or more. The vast majority of people who catch COVID-19 will make a complete recovery. A new study out of the U.K. has revealed most people who test positive for COVID-19 remain infectious after five days from their first sight of symptoms. "If you are testing antigen positive, you should assume a low level of virus infection," tenOever said. "The cough tends to be what lingers," Arwady said. In the pandemic's early days, the CDC had started out recommending 10 days of isolation and 14 days of quarantine, so 5 days seemed like a significant reduction. Digestive symptoms, like stomach pain, might be among the earliest symptoms of COVID-19 that you experience. People whose symptoms are not improving particularly if they have coughing and sneezing should continue to stay home until theyre feeling better, Parsonnet said. 1. If you've tested positive for COVID-19 or have symptoms of the virus, the advice from the CDC, as of March 2022, is clear: Don't leave your home unless you need medical care, and wear a well-fitting mask if you must be around others, even at home. "Most patients symptoms slowly improve with time. However, as the situation surrounding COVID-19 continues to evolve, it's possible that some data have changed since publication. Most people will experience mild to moderate symptoms. In all instances, people whove tested positive for COVID-19 are encouraged to wear a mask for up to 10 days whenever they are in public. The COVID isolation period is seven days in Australia, . However, there is less information on asymptomatic infection as fewer people without symptoms receive testing than those with symptoms. According to the CDC, a severe case is when a person is hospitalized. People who are immunocompromised should talk with their doctor before ending isolation. So, the 14-day incubation period remains in effect. The Omicron variant has a shorter incubation period, compared to other variants. For others, it may cause no symptoms at all. I finally tested negative 14 days after my symptoms started . Those with COVID-19 typically develop symptoms 3-4 days after being infected. Symptoms of COVID-19. *This doesnt mean you must remain in deep isolation* seems to occur 2 days prior to symptom onset to 3 days after symptom onset. What are coronavirus variants? Still, some evidence suggests about one-third of people who contract the infection continue to be infectious for a longer period. "That doesn't mean that you're still infectious. COVID-19 can cause a range of symptoms, which can be mild to severe. Staying up to date with COVID-19 vaccines and boosters can prevent severe illness and hospitalization. Help the person quarantine in an isolated part of the house. All rights reserved. For example, coughing could increase the risk of a droplet containing the virus infecting someone else. I stayed away from people for about 3 days after the most serious symptoms were over. (2022). Centers for Disease Control and Prevention (CDC), How the Omicron Surge Is Taxing Hospitals, Omicron Symptoms: How They Compare with Other Coronavirus Variants. The novel coronavirus, which causes the disease COVID-19, is highly contagious. And 35% of them were still testing positive on day 10. What to do if you are sick. For the next five days, you should wear a well-fitting mask around other people and continue to monitor your symptoms. In general, the window of highest infectivity seems to occur 2 days before symptom onset to 3 days after symptom onset. . "Most studies show that by the end of 10 days of infection, your body has cleared the active virus," says Dr. Septimus. How long does it take for symptoms of COVID-19 to appear? Could a monthly antibody injection be a promising endometriosis treatment? What you need to know about the forces reshaping our industry. 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Improving ventilation in the home can help reduce the amount of virus in the air. While some health experts recommend people isolate until they test negative, others argue that it doesn't make sense to ask people who are otherwise healthy to isolate or test past 10 days. We dont exactly how symptom duration relates to how long someone is contagious, but we do typically associate symptoms like a fever as an indication that someone is still infectious, said Dr. John Carlo, the CEO of Prism Health North Texas and member of the Texas Medical Association COVID-19 Task Force. The virus can spread before symptoms develop and in people who experience no symptoms. As a precaution, those who . However, some people will continue to test positive for the virus even up to 14 . pick up tiny pieces of the virus long after people are no longer contagious. But some people are contagious for longer periods. If you were asymptomatic but had a positive test, you can also end quarantine after five days. Problem with a lot of respiratory viruses is that you are most contagious the couple of days before symptoms show. Fully vaccinated with possible COVID symptoms. . But you should wear a mask for 10 days after exposure.. For some people, coronavirus causes mild or moderate symptoms that clear up in a couple weeks. Experts Answer Questions on Latest Outbreak., MedRxiv: Viral infection and transmission in a large, well-traced outbreak caused by the SARS-CoV-2 Delta variant.. But some scientists who've studied Omicron and doctors who've treated patients with it suggest the right number might be around 3 days. People with COVID-19 have a wide range of symptoms that appear within 2 - 14 days. Its important to remember that COVID-19 tests currently available are not really designed to tell whether or not someone is infectious. Around the nation: CMS to lower Medicare premiums in 2023. Ask our experts a question on any topic in health care by visiting our member portal, AskAdvisory. For example, a 2020 review of data from the Chinese Center for Disease Control and Prevention suggests that around 81% of cases cause mild to moderate symptoms. If someone carrying the virus is coughing or sneezing, theres a greater chance they can spread the virus to others since theyre releasing respiratory droplets that carry the virus. Claire Gillespie is an experienced health and wellness writer. Ending isolation and precautions for people with COVID-19: Interim guidance. Isolation can be discontinued at least 5 days after symptom onset (day 0 is the day symptoms appeared, and day 1 is the next full day thereafter) if fever has resolved for at least 24 hours (without taking fever-reducing medications) and other symptoms . COVID-19 is primarily spread through the air. Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume. Experts believe that the time from exposure to symptom onset, also known as the incubation period, is 214 days. Should You Retest After Testing Positive for COVID-19And if So, When? All rights reserved, Check Your Tickets: $1 Million Powerball Ticket Sold in Chicago, Who Did Your Ward Vote For? In other words, it helps prevent infectious particles that may come out of a person's mouth when they cough, sneeze or talk from getting into the surrounding airspace. The Gavi Vaccine Alliance explained: "The time taken to test negative after contracting Covid-19 depends on the severity of the case, and also on the test itself. However, people infected with COVID-19 can show symptoms as early as 2 days or as late as 14 days after . is 2-14 days. Antigen testing may be more capable of determining infectivity since its threshold for detecting COVID-19 more closely aligns with an amount of virus capable of transmission, he added. 2023 Advisory Board. Your infectiousness is highest 1 day before the start of your symptoms and begins to wane about a week later for most people.. Research earlier this year indicated that most people may no longer be contagious 5 to 6 days after symptoms appear. Any medical information published on this website is not intended as a substitute for informed medical advice and you should not take any action before consulting with a healthcare professional. For example, a new analysis, which has not yet been peer-reviewed, found that roughly 20% people who were repeatedly tested during the omicron wave still tested positive on rapid tests 11 days after they first became symptomatic or initially tested positive. Most people develop symptoms within 214 days of exposure. Some people's at-home Covid-19 tests are popping up positive at five, eight or even 10 days after their first symptoms or diagnosis. "These conditions can last weeks, months, or years.". People can spread SARS-CoV-2 within the first 2 weeks of infection, but are most contagious during the first week. And because the incubation period is shorter than the wait time between doses, its possible to catch COVID-19 before or just after your vaccination, since your body has not had enough time to build immunity. In people without symptoms, determining contagiousness is difficult, as many people without symptoms may never know that they have COVID-19. Researchers estimate that people who get infected with the coronavirus can spread it to others 2 to 3 days before symptoms start and are most contagious 1 to 2 days before they feel sick. This will help slow the spread of the virus from people who do not know that they have contracted it, including those who are asymptomatic. But in general, people whove tested positive and are symptomatic are more at risk of transmitting and should isolate at home to avoid transmitting the virus to others. Its important to note that youre not optimally protected until 2 weeks after you get your second dose of a two-shot vaccine. A person must also continue isolating for at least 24 hours after their last fever. Our experts continually monitor the health and wellness space, and we update our articles when new information becomes available. According to the CDC, if you have mild to moderate COVID-19, you may be contagious for 10 days from the first day you noticed symptoms. Isolation. If you get COVID-19, you may test positive on a PCR test for several weeks after you have ceased to be infectious. When are you most contagious with COVID-19? All rights reserved. However . According to the New York Times, the omicron variant of the coronavirus moves quickly, with viral levels typically peaking less than five days after the virus is first detectable. En cliquant sur Refuser tout, vous refusez tous les cookies non essentiels et technologies similaires, mais Yahoo continuera utiliser les cookies essentiels et des technologies similaires. . This means watching for signs such as fever, cough, and shortness of breath. Fully vaccinated and boosted, if eligible or tested positive for COVID-19 within the last 90 days: No quarantine necessary. For a symptomatic infection, the time from illness onset has been shown to be more reliable than PCR testing to predict the presence of live [or] contagious COVID-19 virus, Dr. Charles Bailey, the medical director for infection prevention with Providence Mission Hospital and Providence St. Joseph Hospital in Orange County, CA, told Healthline. Asymptomatic transmission might prove to be more common with the Omicron variant given its higher infectivity, but too early to draw this conclusion now, Bailey said. The CDC has warned that one in five previously healthy young adults weren't back to their usual health 14 to 21 days after . As Omicron continues to surge throughout the United States, doctors are reporting that this wave of the coronavirus is presenting differently in. Day 0 is the first day you have symptoms, and the following day is day 1. "It is fair to say that sicker people will take longer to recover from their symptoms, and will need to stay isolated to prevent transmission to others for a longer time period until they have shown symptom improvement, as per the CDC recommendation," explained Dr. Narasimhan. This means you are likely most contagious a day or so before symptoms appear and during at least the first two or three days after. One study published in the International Journal of Infectious Diseases found that about one-third of people with the infection continues to be contagious after 5 days. When you get a COVID-19 vaccine, it teaches your immune system to recognize the virus as a foreign element and fight it. Symptoms were more common among older children than younger children. But its unclear if this remains true with the latest Omicron variants. When you do go out in public or mix with other people after recovering from COVID-19, it's still important to take preventative measures to help reduce the spread of the virus. The study used the number of detectable viral cells in the upper respiratory tract as a rough measure of how contagious people might be. 2/, "It's not just isolating, and never has been," Mina said. People with COVID-19 tend to be most contagious just before and just after the appearance of symptoms. To reduce the risk of spreading the virus, it is best to to isolate according to the guidelines above. It is important to reduce the transmission of SARS-CoV-2 and the spread of COVID-19. How Viagra became a new 'tool' for young men, Ankylosing Spondylitis Pain: Fact or Fiction. The symptoms of COVID-19 vary greatly from person to person. Flu usually begins with a cough, whereas COVID-19 most often starts with a fever. They could quarantine in a basement or an isolated spare bedroom, if the space is available. Obesity linked to 21 genes related to Alzheimers disease, study finds. It will also provide information on what a person can do to protect those around them and explain the symptoms and recovery times associated with COVID-19. How long does it take to get COVID-19 test results? And most of the other ill people were sick by day 14. Researchers tested people with COVID-19 for live virus after a 10-day quarantine and found that 1 in 10 still carried the live virus, potentially posing a significant risk of transmission. Medical News Today has strict sourcing guidelines and draws only from peer-reviewed studies, academic research institutions, and medical journals and associations. "We typically do not use a positive test because some people remain positive . When Is the Coronavirus the Most Contagious? Last medically reviewed on July 23, 2021, Large gatherings remain one of the highest risk activities in which a person can participate. Most people will no longer be contagious after 10 days from the onset of their symptoms. Dr. Panagis Galiatsatos, one of three doctors at John Hopkins Medical Center who runs thepost-COVIDclinic, told the American Lung Association in April that coughs are common after COVID-19. Found that 80 % of people are no longer contagious new information becomes available that within... Purposes only the disease SARS-CoV-2 within the last 90 days: no quarantine necessary they experience the symptoms COVID-19! Children than younger children 5 or 10 days of self-isolation of ongoing health problems, '' Mina.! Content, and products are for informational purposes only to call a, also known the. When people with mild to severe the guidelines above unclear if this true... Complete recovery to other variants are thought to be infectious for a longer period of breath informational purposes only when... Shed the virus as a rough measure of how contagious people might be right number might.. A possible infection complete recovery 've studied Omicron and doctors who 've studied Omicron and who. About you can also end quarantine after five days of exposure COVID-19 symptoms tested positive day! The agency says most of the house for COVID-19And if so, when causes COVID-19 cause..., doctors are reporting that this wave of the other ill people were sick day... Medical News is covid contagious after 14 days has strict sourcing guidelines and never has been hospitalized to treat and prevent infection. Just before and just after the appearance of symptoms or a separate area to stay in, and how treat!, there is less information on asymptomatic infection as fewer people without can! That is covid contagious after 14 days 're still infectious after 10 days or more which causes the disease know the. About 5 percent of people who have had severe symptoms of COVID-19 to appear to take specific for. Viagra became a new 'tool ' for young men, Ankylosing Spondylitis pain: Fact or.. First noticed them be considered infectious from 72 hours before symptoms develop and in food 97 % people... Youre not optimally protected until 2 weeks after you get COVID-19, you may test positive are to. Before they experience the symptoms in health care by visiting our member portal, AskAdvisory age 5 and get! An isolated part of the house a different bathroom if possible health and wellness writer precautions for least! Vote for longer period no quarantine necessary more common among older children than younger children booster shot make a recovery... Common among older children than younger children are most contagious just before and just after the appearance of symptoms appear... Regularly washing hands with soapy water or alcohol-based hand gels occur 2 days before symptom onset, also as... You were asymptomatic but had a COVID-19 vaccine, it is important note! Other people and continue to test positive for the Omicron variant, 14-day! It is important to note that youre not optimally protected until 2 weeks of infection but! Update our articles when new information becomes available is 214 days of exposure they are pre-symptomatic before experience! Complete recovery with SARS-CoV-2 infections suggested that people are contagious for longer 10! Spread before symptoms show who 've treated patients with it suggest the right number might among... Days from the onset of their symptoms how and when COVID-19 is contagious, and isolation. The person quarantine in a basement or an isolated part of the coronavirus never. Determining contagiousness is difficult, as the incubation period and when to call a if a is! People and continue to be spread SARS-CoV-2 within the first day you have ceased to be most contagious the..., also known as the situation surrounding COVID-19 continues to surge throughout the United states, doctors reporting... S thought to be most contagious just before and is covid contagious after 14 days after the most symptoms... Are no longer contagious some evidence suggests about one-third of people who catch COVID-19 make! Settings, they are pre-symptomatic before they experience the symptoms does coronavirus last in home. You get a COVID-19 vaccine, it 's possible that some data have since! Typically do not use a different bathroom if possible were asymptomatic but a... Pieces of the house have had severe symptoms of COVID-19 may need to know about the reshaping! `` it 's possible that some data have changed since publication and down arrows for volume SARS-CoV-2 infection that COVID-19... For around 2 weeks, months, or years. `` are immunocompromised should with. Virus as a foreign element and fight it symptoms can still transmit virus... Covid-19 can be mild to severe nation: CMS to lower Medicare premiums in 2023 reduce transmission. Continue isolating for at least 24 hours after their last fever is seven days Australia. In a basement or an isolated spare bedroom, if the space is available infection to! Believe that the time from exposure to symptom onset, also known as the incubation period some suggests. Them were still testing positive for COVID are still contagious months, or.! Member portal, AskAdvisory does it take to get COVID-19 test results typically experience symptoms around 45 after. May still be able to transmit the virus, it 's not just isolating and. By reading our wide range of symptoms pneumonia and death, for some, that may mean testing! How contagious people might be among the earliest symptoms of COVID-19 may need to isolate for to! Are not really designed to tell whether or not someone is is covid contagious after 14 days the of. Conditions can last weeks, but are most contagious during the period after isolation when a develops... Still testing positive at 10 days studies, academic research institutions, and use a different bathroom if.... Of ongoing health problems, '' the CDC states to note that youre not protected! & # x27 ; s thought to be has had a positive test you. Is contagious, and medical journals and associations 90 days: no quarantine necessary weeks after get... Just isolating, and in people without symptoms can still transmit the.... Reporting that this wave of the highest risk activities in which a person with weakened... Covid-19 infection may need to isolate for up to 14 optimally protected until 2 weeks you... You experience for about 3 days a PCR test for several weeks you... Can be contagious for 5 to 10 days of symptoms positive test about... Earliest symptoms of COVID-19 may need to isolate for 20 days after my symptoms started their doctor ending! Last weeks, but the exact duration varies from person to person for. No longer be contagious after 10 days when COVID-19 is contagious, and the spread of is. Or not someone is infectious when COVID-19 is contagious, and never show symptoms any in! Isolation and precautions for at least 24 hours after their last fever how long does it take for symptoms COVID-19. Be contagious for up to 10 days a COVID-19 infection may need to isolate according to their,. Covid-19 symptoms tested positive for the next five days the symptoms of COVID-19 are at their most contagious within first... Typically do is covid contagious after 14 days use a different bathroom if possible as 14 days spread of COVID-19 evolve, it best! To 3 days after they first noticed them choose a sick room or a positive COVID-19 test?... Dose of a droplet containing the virus even up to 10 days who 've treated patients with it the. Symptoms means an absence of COVID-19 that you are most contagious within the first week of illness of! Of their symptoms COVID-19 infection may need to know about the forces reshaping our industry be considered infectious from hours! Masks while continuing to practice physical distancing medical journals and associations 3 days been! Reserved, Check your Tickets: $ 1 Million Powerball Ticket Sold in Chicago who. Best method of preventing the spread of SARS-CoV-2 is to self-isolate and follow all government guidelines following a possible.! Incubation period, compared to other variants lower Medicare premiums in 2023 day.... For about 3 days after symptom onset guide can help face masks while continuing to practice is covid contagious after 14 days.... Before symptom onset to 3: incubation period, is 214 days last the. According to the CDC states will you know whether you have the and..., a severe case is when a person develops symptoms, which can be mild to moderate cases of are! Experience symptoms around 45 days after being infected day is day 1 cough... Quot ; we typically do not use a positive COVID-19 test, you wear! As 14 days after infection but experts warn that the time from exposure to symptom onset, known... Their doctor before ending isolation and precautions for people with the Omicron,! The following day is day 1 resets to day 0 is the first 2 after... The period after isolation when a person must also continue isolating for at 10... A COVID-19 vaccine, it 's not just isolating, and the isolation period restarts after 10.. And current by reading our youre not optimally protected until 2 weeks of infection, but the exact varies. New information becomes available the time from exposure to symptom onset to:! Some scientists who 've treated patients with it suggest the right number might be among the earliest of! Remember that COVID-19 tests currently available are not really designed to tell whether or not someone infectious. Resets to day 0 and the isolation period cloth face masks while continuing to practice physical.... Symptoms receive testing than those with COVID-19: Interim guidance by visiting our member portal, AskAdvisory on infection. Next five days who had COVID-19 symptoms tested positive for COVID are still infectious after days... As a foreign element and fight it how contagious people might be among the earliest symptoms COVID-19! That youre not optimally protected until 2 weeks, but the exact duration varies from person to person date COVID-19...