Global Statistics

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Updated on September 26, 2022 11:57 am
All countries
Updated on September 26, 2022 11:57 am
All countries
Updated on September 26, 2022 11:57 am

Global Statistics

All countries
Updated on September 26, 2022 11:57 am
All countries
Updated on September 26, 2022 11:57 am
All countries
Updated on September 26, 2022 11:57 am
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How Long After Exposure Is Covid Contagious

What Counts As Close Contact And Exposure To Covid

How long after being infected with COVID-19 does someone become contagious?

Close contact:

  • Being within 6 feet of someone for a cumulative total of 10 minutes or longer during the persons infectious period. This exposure can occur over multiple separate contacts or even days.
  • Providing care at home to someone who is sick with COVID-19.
  • Having direct physical contact with the person
  • Sharing eating or drinking utensils.
  • Being sneezed on or coughed on.

While wearing masks, being outdoors, and being fully vaccinated significantly reduce virus transmission, these do not eliminate the risk of infection altogether. These circumstances are still considered close contact to an infectious person, especially for prolonged periods of time.

Infectious period: A person is generally infectious 48 to 72 hours before they develop COVID-19 symptoms and for 10 days after their first symptoms appear. Some people who develop more serious or severe symptoms may be infectious for a longer period please contact your primary care provider for recommendations.

Exposure can mean being in close contact with:

  • Someone who has possible symptoms of COVID-19, unless they test negative while they are sick.
  • Someone who developed symptoms one to two days after you were in close contact. People with COVID-19 may be contagious 48 to 72 hours before they develop symptoms.
  • Someone who has not become ill with symptoms but tested positive for COVID-19 within 7 days of your close contact.

Now Choose Which One Of These Situations Applies To You To Find Out What Happens Next:

  • If youre fully vaccinated: Thank science that you probably just had a much milder case than you would have if you hadnt been vaccinated. Encourage others to get vaccinated.

  • If youre partially vaccinated: Wait a week or two until you go get that second dose of a two-dose vaccine. If you already had an appointment, you may need to delay it. Just make sure you get it.

  • If you havent started the vaccination process, nows the time. Schedule your appointment for a week or two after your contagious period ended.

  • If you werent planning to get vaccinated, please consider doing it after all. Wait a week or two and then start the process. Talk to your doctor or a trusted medical professional if you have questions. Be wary of negative claims on social media.

  • If the person who tested positive or had symptoms is under age 12: Vaccination isnt authorized for this age group yet, but once it is, its important to get vaccinated, even after having COVID.

Keep reading for the final chapter.

When Is A Person With Covid

HealthDay Reporter

FRIDAY, Aug. 27, 2021 — New research delivers an answer to a burning question: When are COVID-19 patients most infectious?

The answer? Two days before and three days after they develop symptoms.

The findings highlight the importance of rapid testing and quarantine if someone is feeling sick, the study authors said.

The researchers also found that infected people are more likely to be asymptomatic if they caught the virus from a primary case who was also asymptomatic.

“In previous studies, viral load has been used as an indirect measure of transmission,” said study co-leader Dr. Leonardo Martinez, an assistant professor of epidemiology at Boston University’s School of Public Health.

“We wanted to see if results from these past studies, which show that COVID cases are most transmissible a few days before and after symptom onset, could be confirmed by looking at secondary cases among close contacts,” Martinez said in a university news release.

For the study, Martinez and his colleagues analyzed data from about 9,000 close contacts of primary cases in the Zhejiang province of China from January 2020 to August 2020. That’s before the advent of the even more contagious Delta variant.

Close contacts included people who lived in the same household or who dined together, co-workers, people in hospital settings and riders in shared vehicles. They were monitored for at least 90 days after their initial positive COVID-19 test results.


More information

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Do People Who Have Been Around Someone With Covid

The short answer: yes. COVID-19 is a highly contagious disease, and stopping the spread means people with COVID-19 or people who have been exposed to need to distance.

The CDC says anyone who has had close contact with someone with COVID-19 should stay home for 14 days after their last exposure to that person.

However, there are exceptions. You don’t need to stay home if you had COVID-19 illness within the previous three months and have recovered and are symptom-free.

Community and close contact exposures continue to be the main drivers of COVID-19. For a September CDC report, researchers assessed community and close contact exposures among those who tested positive and negative for COVID-19. Among those with COVID-19, 42% reported close contact with a person with COVID-19. Most close contact exposures were to family members. Only 14% of those who tested negative reported close contact with a person known to have COVID-19.

The CDC no longer requires a negative PCR test for people with mild to moderate cases to be declared clinically recovered. The decision of when its safe to stop self-quarantining or self-isolating is one that must be made in consultation with your healthcare provider and likely other members of your immediate household.

How Long Are You Contagious With Coronavirus For

How Long After Having Coronavirus Are You Contagious? Here ...

Are you a danger to other people?

As the coronavirus pandemic stretches on, a small proportion of Australians infected have now died, while most have either recovered, or are likely to recover over the next few weeks.

One thing many of us want to know is for how long people who have SARS-CoV-2, the virus that causes COVID-19, are able to pass it on to someone else.

Lets look at what the science tells us so far.

How long does it take to get sick?

The incubation period is the time between being exposed to the virus and the onset of symptoms.

For COVID-19, the incubation period ranges from 1 to 14 days. But most people who develop COVID-19 symptoms do so 4 to 6 days after exposure.

How long are you infectious?

The infectious period means the time youre able to spread the virus to someone else.

For COVID-19, there is emerging evidence to suggest the infectious period may start 1 to 3 days before you develop symptoms.

The most infectious period is thought to be 1 to 3 days before symptoms start, and in the first 7 days after symptoms begin. But some people may remain infectious for longer.

Commonly reported symptoms for COVID-19 such as fever, cough and fatigue usually last around 9 to 10 days but this can be longer.

Why are some people infectious for longer?

Typically with viruses, the higher the viral load , the higher the risk of transmission through known transmission pathways.

Read more: How can I treat myself if I’ve got or think I’ve got coronavirus?

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When Are You Contagious With Covid

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. People with the infection can infect others before they develop symptoms, even if they experience no symptoms at all.

The novel coronavirus is highly contagious. It spreads through tiny droplets or direct contact with someone carrying the infection. The best method of preventing the spread of SARS-CoV-2 is to self-isolate and follow all government guidelines following a possible infection.

Read on to find out more about how and when COVID-19 is contagious, and how to treat and prevent the infection.

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. The study used the number of detectable viral cells in the upper respiratory tract as a rough measure of how contagious people might be.

The study found that SARS-CoV-2 causes this peak infectious period to occur earlier than other coronaviruses, such as SARS-CoV and MERS-CoV.

The World Health Organization suggests that people are likely to be most infectious around 2 days before developing symptoms and in the early stages of their illness.

However, this peak will vary from case to case. 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.

How Contagious Is The Coronavirus Disease

Itâs important to note that emerging research shows that the Delta variant is nearly twice as contagious as previous COVID-19 variants.

According to the Mayo Clinic, âThe virus appears to spread easilyâ through close contact with other people via respiratory droplets that are released anytime a person sneezes, coughs, or talks.

Those droplets may land on you or a surface that you touch before touching your eyes, mouth, nose, or face.

Read: How Long Can Coronavirus Live on Surfaces?

A number called Ro indicates how many people the virus typically spreads to from one infected individual.

Ro will vary depending on your location and potential number of exposed individuals. For example, in dense cities, Ro is likely to be higher than in rural areas because people are more likely to come into contact with more individuals.

Studies have put the COVID-19 Ro as high as 7 and as low as 2. The estimate for the Alpha variant was 1.4-3.9 and the Delta variant is estimated to be 6.

For context, the seasonal flu Ro tends to be around 1.3 and the measles could have an Ro as high as 18, making measles the highest known to humankind.

This graphic demonstrates how an Ro of 2 spreads from one person to two people and so on. Graphic source:University of Michigan

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Mask Use And Ventilation Improvements To Reduce Covid

Study population:

  • Students at 169 elementary schools in the state of Georgia.

Primary endpoint:

  • COVID-19 incidence amid staff and children at these elementary schools.

Key findings:

  • This was a study of elementary schools in the state of Georgia with varying school-based infection prevention measures, including physical barriers in the classroom, social distancing, reductions in class size, cohorting of students, increased handwashing stations, mandated masking and ventilation strategies.
  • The study found that COVID-19 rates were 39% lower in schools that introduced ventilation strategies and 37% lower in schools that mandated masking for staff and teachers.


  • Compliance with infection prevention measures such as masking was not measured.
  • Response rate was low at 11.6%.
  • Infection control practices were not standardized across all sites.

Getting A Positive Covid Test

VERIFY: Can you test positive for COVID-19 long after you’re contagious?

Nichols said that if you test positive but do not have symptoms, you should isolate for 10 full days from the positive test.

If you have had COVID, you can start seeing other people after certain criteria have been met:

  • Its been at least 10 days since your symptoms started
  • Youve gone at least 24 hours without a fever without the use of fever-reducing medications
  • Your symptoms are getting better and you do not have any new symptoms

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How People Can Be Exposed To Covid

COVID-19 is spread mainly from person to person. Spread occurs more commonly between people who are in close contact with one another through respiratory droplets and particles that come from the mouth or nose when an infected person coughs, sneezes, sings, or speaks.

COVID-19 is spread in three main ways:

  • Breathing in air that has small droplets and particles containing the virus. This type of spread is more likely to happen if you have close contact with an infected person. It can also happen when you are not in close contact with someone, especially if you are in enclosed indoor spaces with poor airflow and when you are exposed for a longer period.
  • Having small droplets and particles containing the virus land in the eyes, nose, or mouth, especially through splashes and sprays like a cough or sneeze.
  • Touching the eyes, nose, or mouth with hands that have the virus on them. It is also uncommon for COVID-19 to spread through contact with contaminated surfaces. This means that you are unlikely to get COVID-19 by touching your eyes, nose, or mouth after touching a contaminated item.
  • COVID-19 can spread from people to animals in some situations, but this is uncommon. Pet cats and dogs can also sometimes become infected after close contact with people with COVID-19. Additionally, cases of reinfection with COVID-19 remain rare.

    The Tragedy Of Long Covid

    Suppose you are suddenly are stricken with COVID-19. You become very ill for several weeks. On awakening every morning, you wonder if this day might be your last.

    And then you begin to turn the corner. Every day your worst symptoms the fever, the terrible cough, the breathlessness get a little better. You are winning, beating a life-threatening disease, and you no longer wonder if each day might be your last. In another week or two, youll be your old self.

    But weeks pass, and while the worst symptoms are gone, youre not your old self not even close. You cant meet your responsibilities at home or at work: no energy. Even routine physical exertion, like vacuuming, leaves you feeling exhausted. You ache all over. Youre having trouble concentrating on anything, even watching TV youre unusually forgetful you stumble over simple calculations. Your brain feels like its in a fog.

    Your doctor congratulates you: the virus can no longer be detected in your body. That means you should be feeling fine. But youre not feeling fine.

    The doctor suggests that maybe the terrible experience of being ill with COVID-19 has left you a little depressed, or experiencing a little PTSD. Maybe some psychiatric treatment would help, since theres nothing wrong with you physically. You try the treatment, and it doesnt help.

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    How Is The Virus Transmitted

    SARS-CoV-2 spreads mostly from person to person through close contact or from droplets that are scattered when a person with the virus sneezes or coughs.

    The novel coronavirus is highly contagious, which means it spreads easily from person to person. According to the CDC , people who have the virus are most contagious when theyre showing symptoms of COVID-19.

    Although its much less common, theres a possibility that someone who is infected with the coronavirus can transmit the virus even if theyre not showing symptoms.

    Its also possible that the virus can be transmitted via touching virus-contaminated surfaces and then touching your mouth or nose. However, this isnt the main way the novel coronavirus spreads.

    How Can I Protect Myself While Caring For Someone That May Have Covid

    How Long Does It Take for COVID Symptoms to Appear?

    You should take many of the same precautions as you would if you were caring for someone with the flu:

    • Stay in another room or be separated from the person as much as possible. Use a separate bedroom and bathroom, if available.
    • Make sure that shared spaces in the home have good air flow. If possible, open a window.
    • Wash your hands often with soap and water for at least 20 seconds or use an alcohol-based hand sanitizer that contains 60 to 95% alcohol, covering all surfaces of your hands and rubbing them together until they feel dry. Use soap and water if your hands are visibly dirty.
    • Avoid touching your eyes, nose, and mouth with unwashed hands.
    • Extra precautions:
    • You and the person should wear a face mask if you are in the same room.
    • Wear a disposable face mask and gloves when you touch or have contact with the person’s blood, stool, or body fluids, such as saliva, sputum, nasal mucus, vomit, urine.
    • Throw out disposable face masks and gloves after using them. Do not reuse.
    • First remove and throw away gloves. Then, immediately clean your hands with soap and water or alcohol-based hand sanitizer. Next, remove and throw away the face mask, and immediately clean your hands again with soap and water or alcohol-based hand sanitizer.
  • Do not share household items such as dishes, drinking glasses, cups, eating utensils, towels, bedding, or other items with the person who is sick. After the person uses these items, wash them thoroughly.
  • Wash laundry thoroughly.
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    Clinical Immunological And Virological Characterization Of Covid

    Overall, 14% of patients in this study were positive for SARS-CoV-2 on RT-PCR. In a subsample of specimens, viral culture was attempted but not successful.

    Study population:

    • 619 COVID-19 cases who were discharged between 23 January and 19 February, isolated in hotels, and underwent repeat testing on day 7 and 14 after discharge.

    Primary endpoint:

    • To characterize re-positive patients with COVID-19.

    Key findings:

    • 87 of the 618 people tested became positive for SARS-CoV-2 on repeat RT-PCR testing.
    • All re-positive cases had mild or moderate symptoms in initial diagnosis, with a mean age of 30.4 years.
    • 137 swabs and 59 serum samples from 70 re-positive cases were collected.
    • Neutralization antibodies titer distributions of the 59 serum samples were similar to other COVID-19 cases parallel-tested in the study.
    • Viral culture was attempted on 33 repeat positive cases successful isolation did not occur, and no full-length viral genomes could be sequenced.


    S To Take If You Had Close Contact With Someone With Covid

    • Do not go to work, school, or public areas. Do not take public transportation, taxis, or ride-shares.
    • If you live with someone with COVID-19, stay separated from sick members in the household as much as possible. Avoid sharing the same space within the home, including being in the same room. Use a different bedroom or bathroom if that is possible.
    • Monitor your health for 14 days after your last contact.
    • Take your temperature with a thermometer two times a day and watch for fever. Also, watch for other symptoms of COVID-19, such as cough, shortness of breath, chills, muscle pain, sore throat, or new loss of taste or smell.
    • Your local health department may ask you to check in with Sara Alert. Youll get a message from Sara Alert each day and answer a few questions about how youre feeling. If youre having COVID-19 symptoms, the health department will follow up with you. By checking in with Sara Alert, you can let the health department know how youre feeling and help to slow the spread of COVID-19 in your community. Learn more about How Sara Alert Works.

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