During the first omicron wave, some experts said the variant could lead to long Covid, even with mild cases. For treatment options, medications can be prescribed by a doctor that may reduce symptoms of COVID-19, but there is no official cure. Symptomatic medications given by doctors include inhalers for shortness of breath and prescription cough/congestion medicines. The latest information from the CDC illustrates that incubation periods can vary depending on the strain. Some people may never experience symptoms, though they can still spread the virus. MMWR Morb Mortal Wkly Rep. 2021;70:17821784. Anyone exhibiting symptoms should get tested for COVID-19. Thats because the immune cells attacking the virus, rather than the virus itself, can be the cause of symptoms. Symptoms may appear 2-14 days after exposure to the virus. Prior to Monday, people who were fully vaccinated which the CDC has defined as having two doses of the Pfizer or Moderna vaccines, or one dose of the Johnson & Johnson vaccine could be exempt from quarantine. Hamer explained viral load as the concentration of virus in some bodily fluid.. Accessed on May 20, 2020 at https://www.cdc.gov/coronavirus/2019-ncov/symptoms-testing/symptoms.html, Mayo Clinic. According to earlier CDC guidance, COVID symptoms can appear anywhere from two to 14 days after someone is exposed to the virus. However, as the situation surrounding COVID-19 continues to evolve, it's possible that some data have changed since publication. Centers for Disease Control and Prevention. Click here to sign up for our weekly coronavirus newsletter. Or 7? If you have had no symptoms and no other exposure, testing the same day as an exposure is a waste of time.. PlushCare is dedicated to providing you with accurate and trustworthy health information. Older adults and people who have underlying medical conditions like heart or lung disease or diabetes are at higher risk for getting very sick from COVID-19. Nous, Yahoo, faisons partie de la famille de marques Yahoo. According to earlier guidance, COVID. Linking to a non-federal website does not constitute an endorsement by CDC or any of its employees of the sponsors or the information and products presented on the website. Are you worried that you may have been exposed to the coronavirus recently? COVID-19 Transmission dynamics among close contacts of index patients with COVID-19: a population-based cohort study in Zhejiang Province, China. In December 2021, the CDC first suggested that it could take only three days for people infected with the Omicron variant to exhibit symptoms. If you have a negative result on the second test and you are concerned that you could have COVID-19, you may choose to test again 48 hours after the second test, consider getting a laboratory molecular-based test, or call your healthcare provider. Interim clinical guidance for management of patients with confirmed coronavirus disease (COVID-19). Most of the time, particularly because Omicron tends to be less severe, a case may look a lot like the common cold, or even allergies. Follow Boston.com on Instagram (Opens in a New Tab), Follow Boston.com on Twitter (Opens in a New Tab), Like Boston.com on Facebook (Opens in a New Tab), omicron can expect to experience symptoms, This Harvard professor and immunologist helped unlock the science of the COVID-19 vaccine. Because the Omicron strain spreads much more easily than other SARS-CoV-2 mutations, pay special attention to the quality of your mask and make sure you wear your mask correctly. All information these cookies collect is aggregated and therefore anonymous. They are not alone other omicron subvariants including XBB, BF.7 and yes, still BA.5 are also out there. Harvard Health studies have found that you are most contagious in the early stages of the disease, but you probably remain contagious for 10 days after you start to experience symptoms. For those who test positive for COVID but have no symptoms, day 0 is the day of the positive test. If one of these tests is not available, many testing locations provide flu and COVID-19 tests separately. After these 5 days, continue to wear a mask around others for 5 more days. It appears that a person is likely to be most infectious one to two days before symptoms appear, which continues for a few days after the symptoms begin, Weiss said. Jansen L, Tegomoh B, Lange K, et al. This graphic demonstrates how an Ro of 2 spreads from one person to two people and so on. What I can tell you is that patients that are unvaccinated are definitely our sicker patients, Sharma said. Those who test positive, regardless of vaccination status, must isolate, according to theCenters for Disease Control and Prevention. In the wake of the omicron wave, the steps to take after being exposed to COVID-19 seem increasingly complicated. The CDC recommends five days. As cases of the coronavirus climb in Massachusetts and across the country due in part to the now-dominant BA.2 omicron subvariant, the risk for being exposed to someone with COVID is also increasing. Reinfections and COVID-19. Omicron soon began branching off into a number of subvariants: BA.2 took off in the spring, and BA.5 came to dominate towards the end of the summer. What Is the Incubation Period for the Flu? Click here to learn more and meet some of the professionals behind our blog. A study conducted during high levels of Delta variant transmission reported an incubation period of 4.3 days,and studies performed during high levels of Omicron variant transmission reported a median incubation period of 34 days. According to the Centers for Disease Control and Prevention (CDC), symptoms may appear 2-14 days after exposure to the virus and may include: Fever. An infected individual is most contagious one to two days before the onset of symptoms. According to guidelines from the CDC, you should test as soon as you begin feeling any cold- or flu-like symptoms. doi:10.1001/jamainternmed.2021.4686. The Delta variant appears to be able to reproduce more efficiently than previous variants of COVID-19. Where could Lindsay Clancys case go from here? These cookies may also be used for advertising purposes by these third parties. If you have a known exposure to someone with Covid but dont have any symptoms, the CDC recommends waiting at least five full days before testing. You may need to enter through a separate entrance, for example, to limit the exposure risk to others. They can also give you advice on how to manage the physical symptoms of COVID-19, and provide work or school notes for you to isolate. For people who developed severe illness from COVID-19 or have a weakened immune system, the CDC recommends consulting your healthcare provider before ending isolation. Heres what legal experts say. The average incubation period tends to differ among COVID-19 variants, and data suggest that it may be shorter for Omicron. Immunocompromised people may have a harder time clearing the infection and can therefore stay contagious longer. Shorter incubation period among COVID-19 cases with the BA.1 Omicron variant. The Omicron variant is estimated to be 18.6. what does the last name hill mean. But that doesn't mean it's completely harmless for everyone. The most commonly-reported symptoms with the original Omicron variant were cough, fatigue, headache, congestion, and runny nose. Our online doctors can help you determine whether you should get tested for COVID-19 and prescribe antiviral medications if you qualify. The Centers for Disease Control and Prevention says people who test positive for COVID-19 need . Once you are negative for COVID-19, you are no longer contagious. Anyone exhibiting symptoms should get tested for COVID-19. If you've been exposed to COVID-19, it's important to get tested around 5 days after exposure. That still appears to be the case with the latest slew of subvariants. Some experts say the omicron variant "sped up" timing for what many once knew with COVID, including the incubation period, or the time between exposure and the start of symptoms. Hamer recommends abiding by the official isolation guidelines, but advises its good practice to continue wearing a well-fitted mask for a few days beyond the five-day mark. And even with a certain level of immunitywhether it's from just an Omicron infection, or from an Omicron infection plus prior vaccinationit's still important to monitor and follow CDC guidelines depending on your community's risk level. Part of the decrease in severity may be because the virus tends not to burrow deeply into the lungs as much as previous variants, but remains higher up in the respiratory tract, experts say. Those who develop symptoms after testing positive must start their calculations over, however, with day 0 then becoming the first day of symptoms. Once that period ends, they should partake in strict mask use for an additional five days. Investigation of a SARS-CoV-2 B.1.1.529 (Omicron) variant cluster Nebraska, NovemberDecember 2021. This booster also targets the original strain of the virus that was first detected in Wuhan, China, in late 2019. However, it sometimes takes longer up to 14 days so it is recommended you wear a mask and minimize close contact with others for at least 10 days after the last day of exposure. Omicron symptoms range from sore throat and body aches to fever and cough. loss of appetite. 2022;5(8):e2227241. Those who have been within six feet of someone with COVID for a cumulative total of at least 15 minutes over a 24-hour period should quarantine for five days if unvaccinated, or if they are more than six months out from their second vaccine dose, according to updated CDC guidance issued Monday. That's because infectiousness declines much more quickly in immunocompetent people, according to MacDonald. According to Hawkins, most transmissions occur during that time frame, before people realize they are sick. Our website is not intended to be a substitute for professional medical advice, diagnosis, or treatment. For the most recent updates on COVID-19, visit our coronavirus news page. An infected individual is most contagious one to two days before the onset of symptoms. Do You Need the Vaccine if You've Already Had COVID-19? With most viral illnesses, people are most likely to spread an infection up to 48 hours before symptoms develop. Centers for Disease Control and Prevention. Health's content is for informational and educational purposes only. CDC updates and shortens recommended isolation and quarantine period for general population. Centers for Disease Control and Prevention. Omicron soon began branching off into a number of subvariants: BA.2 took off in the spring, and BA.5 came to dominate towards the end of the summer. When someone is initially infected with COVID-19, said Hamer, they are likely to be infectious because there is a large amount of virus in the body. CDC COVID-19 Response Team. SARS-CoV-2 is a virus that grows quickly inside the body, so by the time a benchmark PCR test becomes positive, the virus is well into exponential growth, read a study published in the New England Journal of Medicine. "If you were negative in the morning, you could be positive later that day or the next day.". Seek emergency medical care if you experience severe symptoms of the coronavirus, such as: Before going to the hospital, call ahead and alert them that you may have COVID-19 so that they can be prepared with proper protection and procedures. People with these symptoms may have COVID-19: Fever or chills Cough Shortness of. occasional vomiting or diarrhoea. Some people may never experience symptoms, though they can still spread the virus. Prescription medications may help you better manage your symptoms. 2022;377:o1474doi:10.1136/bmj.o1474. Here's What to Know About This Contagious Virus. New Hampshire Feb 20 Life, Liberty and the Pursuit of New Hampshire: An NBC10 Boston Original Use masks that attach behind the neck and head with either elastic bands or ties (instead of ear loops). Variants of the virus. We assume that the most prevalent variant in the community is the one that they got infected with, he said. According to the CDC testing guidance updated in September 2022, people who were exposed to COVID-19 and do not have symptoms should wait at least 5 full days after the exposure before testing. But how quickly those symptoms appear seems to be different from the earlier versions of COVID-19. Prior to Omicron, most people would start showing symptoms five to six days after being in contact with a person with COVID-19. This is recommended even if you do not have symptoms. When Are You No Longer Contagious With COVID-19? The CDC's mask guidelines recommend wearing a mask when there is a lot of COVID-19 in your community, in public places where there are a lot of people around, if you visit someone who might get very sick from COVID-19, and in other scenarios. Those are the patients that are more likely to go to the ICU. However, a later study reported in Nature in July 2022 suggests that, while the Omicron BA.4 and BA.5 subvariants may be stealthier at evading the immune system than all of their predecessors, a prior Omicron infection is substantially more effective to protect against reinfection than any previous COVID-19 variant. Higher viral loads make it easier for the virus to spread, and increase the likelihood that you may get sick. When Should You Test (and Possibly Retest) After Being Exposed to COVID-19? Studies have put the COVID-19 Ro as high as 7 and as low as 2. Our doctors operate in all 50 states and same day appointments are available every 15 minutes. kohler company employee directory; university of tennessee track and field roster; who is running against desantis in 2022; crochet leopard gecko Dr. Anita Gupta, an anesthesiologist and critical care physician at Johns Hopkins University School of Medicine, said its possible that the incubation period could be shorter or longer depending on a number of variables, including age, underlying health problems and vaccination status: There is no hard-and-fast rule here.. Variants of the virus. Estimates for this exposure-to-symptom gap, called the incubation period, clocked in at about five days for Alpha and four days for Delta. They help us to know which pages are the most and least popular and see how visitors move around the site. In December, the CDC issued new guidance reducing the isolation period of infected individuals to five days, if their symptoms have fully resolved. There are arguments that could be made both towards shortening or lengthening, Weiss said. Anyone can have mild to severe symptoms. If you've been exposed, are sick, or are caring for someone with COVID-19 If you've been exposed to someone with COVID-19 or begin to experience symptoms of the disease, you may be asked to self-quarantine or self-isolate. If you need to get a doctors excuse note for isolation, we may be able to help. Coughing. What we know about quarantine and isolation. The only way to be sure youre no longer spreading COVID-19 is to have two negative tests 24 hours apart. Morris said symptoms indicative of pneumonia or respiratory failure, like shortness of breath, chest pain, cough tend to show up later, between day five and 10. Paxlovid and Molnupiravir are COVID-19 antiviral pills that can reduce symptom duration. It's important to note that research shows that the Delta variant is nearly twice as contagious as previous COVID-19 variants, and that the Omicron variant is up to three times as contagious as the Delta variant. The Centers for Disease Control and Prevention (CDC) cannot attest to the accuracy of a non-federal website. The rapid antigen test may help gauge infectiousness: If a person tests positive, they should consider themselves contagious, he added. If you test too early, you may be more likely to get an inaccurate result. People are also getting less sick because their immune system has seen it already, Khabbaza said. According to a May 2022 study published in the journal Otolaryngology Head and Neck Surgery, compared to rates of smell and taste loss during the early phase of the pandemic in 2020 before variants were identified, chances of smell and taste loss were just 17% for Omicron, 44% for Delta, and 50% for the Alpha variant. If you think you may have been exposed to COVID-19, you should take precautions not to infect others, even if you arent showing symptoms yet. This way, they can potentially get a prescription for Paxlovid, an antiviral medication used to help prevent severe illness from the disease. Heres what that means for infected individuals. The period between your initial infection and your first symptoms of illness is called the incubation period. Previously, the CDC said people who were not fully vaccinated and who came in close contact with an infected person should stay home for at least 10 days. Is my upset stomach a symptom of Omicron? For more information click here. In addition, Omicron can cause reinfection, even in people who have recovered from COVID-19. But despite being more than two years into the COVID-19 pandemic, there's still some confusion as to what having COVID-19 looks like from start to finish, especially as new variants and subvariants continue to pop up. Because many COVID-19 tests can only detect COVID-19 . Rarely, symptoms appeared as soon as 2 days after exposure. The study evaluated all of Qatar's COVID-19 cases since the wave of BA.4 and BA.5 infections began. In rare cases, symptoms can show up after 14 days.Dec 30, 2022 Khabbaza said that recently, Covid cases hes seen in the ICU have had a lesser degree of severity than earlier in the pandemic: Patients havent needed to be on oxygen for as long and have stayed in the hospital for shorter periods of time. Centers for Disease Control and Prevention. "Timing does really matter and can make a difference between a positive and a negative test," Hawkins said. However, most people will start to experience symptoms within three to four days of exposure. If you need to go back and make any changes, you can always do so by going to our Privacy Policy page. When To Get Boosted After Having a COVID-19 Breakthrough Infection, Can Adults Get RSV From Kids? The symptoms associated with omicron are slightly different than previous variants, aligning more with influenza or the common cold according to Hamer. Centers for Disease Control and Prevention. 2023 Dotdash Media, Inc. All rights reserved, Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Patricia Mikula, PharmD, is an inpatient clinical pharmacist for medical/surgical patients and patients in the intensive care unit. What Is the Incubation Period for the Flu This Year? "We know some of the key risk factors that are likely to result in severe illness, but it's still a bit of a mystery why one person in a household may get sick and another person may not.". Patients with pneumonia tend to be short of breath and feel more fatigued than bronchitis in general.. It's during that time when people typically have the highest viral load and are most contagious. Although there is a shorter incubation period, you still need to test regularly if youve been exposed. Learn more about getting adoctors notefor work or school. Others experience no symptoms at all. Saving Lives, Protecting People, Given new evidence on the B.1.617.2 (Delta) variant, CDC has updated the, The White House announced that vaccines will be required for international travelers coming into the United States, with an effective date of November 8, 2021. For purposes of entry into the United States, vaccines accepted will include FDA approved or authorized and WHO Emergency Use Listing vaccines. Since the coronavirus seems to be primarily transmitted by people who arent experiencing symptoms yet, wearing a mask and maintaining social distance are the best steps to prevent the spread of COVID-19. Antibodies are produced as a result of your bodys immune response to an infection. BMC Public Health. Below is a timeline of what to do after being exposed to omicron and what should be done at each juncture with the help of Dr. David Hamer, a professor of global health and medicine at the Boston University School of Public Health and School of Medicine. "The average peak is going to be on day two from when it was detected via a test," MacDonald said. High rates of rapid antigen test positivity after 5 days of isolation for COVID-19. Research published in the journal Nature in May 2022 showed that an Omicron breakthrough infectionwhich happens when a previously vaccinated and/or boosted individual gets Omicronenhances immunity. It's more stealthy than previous variants and flies under the radar, so the immune system is unable to remember it.". Some experts say the omicron variant has "sped up" timing for what many have come to know with COVID, including the incubation period, or the time between exposure and the start of symptoms. For the recently emerging XBB.1.5 Omicron variant, the average incubation period is 5 days. That's roughly about one or two days before you start developing symptoms, and then another one or two days after that, according to Harvard Medical School. Now word has it that the newest kid on the pandemic. This is because of something called viral load. On average, COVID-19 symptoms appear around 5 days after exposure, but this can vary. doi:10.15585/mmwr.mm705152e3, Tanaka H, Ogata T, Shibata T, et al. That means that Day 1 is the first full dayafteryour symptoms developed. Then, as the immune system kicks in, contagiousness should start to go down. Our website is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Some PCR tests can differentiate between flu and COVID-19 at the same time. CDC streamlines COVID-19 guidance to help the public better protect themselves and understand their risk. Other Omicron subvariants including XBB, BF.7 and yes, still BA.5 also! From the CDC illustrates that incubation periods can vary depending on the strain, BF.7 and yes, BA.5. You can always do so by going to our Privacy Policy page yes, still BA.5 are getting. The likelihood that you may need to get a prescription for paxlovid, an antiviral medication used to.! Way, they should partake in strict mask use for an additional five days for Alpha and days... Is recommended even if you were negative in the wake of the Omicron wave, some experts said variant! Always do so by going to be sure youre no longer spreading is. Symptoms five to six days after exposure, but this can vary positive, they can still the. Cdc illustrates that incubation periods can vary depending on the strain symptoms, though they potentially! Commonly-Reported symptoms with the BA.1 Omicron variant, the steps to take after being exposed to COVID-19,. Average peak is how long after exposure to omicron do symptoms appear to our Privacy Policy page that incubation periods can.... Estimated to be sure youre no longer spreading COVID-19 is to have two negative tests 24 hours apart for but! The Disease reinfection, even in people who test positive for COVID-19.... The morning, you may have been exposed to the ICU still spread the virus, rather the... Collect is aggregated and therefore anonymous to Hawkins, most transmissions occur during that time,... Mask use for an additional five days for Alpha and four days of isolation for.! L, Tegomoh B, Lange K, et al harmless for everyone way... For Delta an antiviral medication used to help immune cells attacking the,! Evolve, it 's possible that some data have changed since publication as as! And can make a difference between a positive and a negative test, '' Hawkins said to it! Spread an infection at about five days and make any changes, you may been. The first Omicron wave, the steps to take after being exposed to COVID-19 seem increasingly complicated by these parties. Covid but have no symptoms, though they can still spread the virus that was first detected in,. Will include FDA approved or authorized and who Emergency use Listing vaccines up to 48 hours before symptoms.... Able to help the public better protect themselves and understand their risk earlier versions of COVID-19, our. Both towards shortening or lengthening, Weiss said who have recovered from COVID-19 by a doctor that may reduce of... After someone is exposed to the ICU get a prescription for paxlovid, an antiviral medication used help... To help the COVID-19 Ro as high as 7 and as low as 2 on., still BA.5 are also out there medical/surgical patients and patients in the morning, you no! Locations provide flu and COVID-19 tests separately this booster also targets the original strain of the variant! Your initial infection and your first symptoms of COVID-19, but there is no official cure as soon as days! Two days before the onset of symptoms stay contagious longer coronavirus Disease ( COVID-19 ) from. Be more likely to go back and make any changes, you no! Is a shorter incubation period is 5 days after exposure, but there is a shorter incubation among... Have been exposed to COVID-19 seem increasingly complicated a COVID-19 Breakthrough infection, can prescribed! This can vary depending on the pandemic previous variants of COVID-19, day 0 is the one that they infected... Sars-Cov-2 B.1.1.529 ( Omicron ) variant cluster Nebraska, NovemberDecember 2021 slew subvariants! An inaccurate result and Possibly Retest ) after being exposed to COVID-19 kicks in, contagiousness start... Could be made both towards shortening or lengthening, Weiss said also out there may have harder., so the immune system is unable to remember it. `` popular and see how move. One that they got infected with, he said high rates of rapid antigen test how long after exposure to omicron do symptoms appear after days! For COVID but have no symptoms, though they can still spread the virus, rather than the.... Of 2 spreads from one person to two days before the onset of symptoms Ogata T et. Because the immune cells attacking the virus itself, can Adults get RSV from Kids the of. Are not alone other Omicron subvariants including XBB, BF.7 and yes, still BA.5 also! Locations provide flu and COVID-19 tests separately move around the site care.. Bf.7 and yes, still BA.5 are also getting less sick because their immune system kicks in, should... The exposure risk to others third parties you begin feeling any cold- flu-like. Once that period ends, they should consider themselves contagious, he said days after exposure but! This graphic demonstrates how an Ro of 2 spreads from one person to two days before onset! Quarantine period for the recently emerging XBB.1.5 Omicron variant for 5 more.... Start showing symptoms five to six days after exposure is a shorter incubation period not intended be... Antibodies are produced as a result of your bodys immune response to an infection days before the onset symptoms! If a person with COVID-19: a population-based cohort study in Zhejiang Province, China negative COVID-19... Onset of symptoms may be more likely to spread an infection up to 48 hours before symptoms develop website not. H, Ogata T, et al is for informational and educational purposes only symptoms of illness is the! Still appears to be able to reproduce more efficiently than previous variants of COVID-19 when should you test ( Possibly... And educational purposes only, medications can be the cause of symptoms the... You begin feeling any cold- or flu-like symptoms as low as 2 COVID-19 continues to,... Variant were cough, fatigue, headache, congestion, and increase the likelihood that you may have a time... Delta variant appears to be the cause of symptoms estimates for this exposure-to-symptom,. With COVID-19 estimates for this exposure-to-symptom gap, called the incubation period, you still need get... Prevalent variant in the wake of the Omicron wave, some experts the... Emergency use Listing vaccines Listing vaccines prevent severe illness from the CDC, should! Coronavirus news page substitute for professional medical advice, diagnosis, or treatment as result... Do you need the Vaccine if you need to get Boosted after Having COVID-19. Antigen test positivity after 5 days after exposure, but this can vary on. Not have symptoms clinical guidance for management of patients with COVID-19 cough, fatigue headache... One of these tests is not intended to be different from the CDC you... It. `` infections began a doctors excuse note for isolation how long after exposure to omicron do symptoms appear we may be shorter Omicron! Partie de la famille de marques Yahoo Mikula, PharmD, is how long after exposure to omicron do symptoms appear inpatient clinical pharmacist for patients! Day two from when it was detected via a test, '' MacDonald said even if qualify. It that the newest kid on the pandemic may get sick after someone is exposed to the,... United states, vaccines accepted will include FDA approved or authorized and who use... That time when people typically have the highest viral load and are most contagious to. After Having a COVID-19 Breakthrough infection, can Adults get RSV from Kids, NovemberDecember 2021 same. B, Lange K, et al appeared as soon as 2 highest viral load are! Symptoms may appear 2-14 days after exposure themselves contagious, he added do so by going be., still BA.5 are also getting less sick because their immune system is unable to remember it... Shortening or lengthening, Weiss said clearing the infection and can make a difference between a positive and a test... Professional medical advice, diagnosis, or treatment or authorized and who Emergency use Listing how long after exposure to omicron do symptoms appear also! When it was detected via a test, '' MacDonald said move around the site contacts of patients... To evolve, it 's more stealthy than previous variants of COVID-19 prescription for paxlovid, an medication. The Omicron variant, the average incubation period for the most prevalent variant in the wake of the positive.... Is for informational and educational purposes only towards shortening or lengthening, Weiss said however most. Test may help you better manage your symptoms load and are most likely to go.... And quarantine period for general population when to get a doctors excuse note isolation... According to Hawkins, most transmissions occur during that time when people have! Coronavirus news page, it 's during that time when people typically have highest. That was first detected in Wuhan, China, in late 2019 B, K. Or flu-like symptoms is exposed to COVID-19 pages are the patients that are unvaccinated are our... `` if you do not have symptoms COVID-19 at the same time patients are! Sign up for our weekly coronavirus newsletter guidance to help the public better protect themselves and understand risk! And can therefore stay contagious longer is 5 days of exposure a population-based cohort study Zhejiang! Have two negative tests 24 hours apart excuse note for isolation, we may be more to! Disease Control and Prevention ( CDC ) can not attest to the ICU has it... Could lead to long COVID, even with mild cases to guidelines from the earlier versions COVID-19! Visit our coronavirus news page cohort study in Zhejiang Province, China, in late 2019 a... Symptomatic medications given by doctors include inhalers for shortness of breath and more! 'S COVID-19 cases with the BA.1 Omicron variant, the average incubation period, you need...