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How long has F0 been positive for COVID-19?

The CDC has issued guidance on what to do within 10 days of testing positive for COVID-19. Asymptomatic F0 only need to quarantine for 5 days. Even after recovering from illness, F0 should still wear a mask until the end of day 10.

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Most F0 tests are positive for COVID-19 within the first few days of infection. During the prescribed home isolation period, depending on symptoms, the F0 will usually be negative again (within 5 days, or within 10 days). Then you can go back to your normal life.

However, for some F0s, it takes weeks to months to return a negative result. Even after symptoms are gone, the test results are not negative.

According to the CDC, F0 should only be retested 5 days after being diagnosed with COVID-19. If the result is positive, continue to isolate for 5 days.

CDC: Asymptomatic F0 only isolate for 5 days, wear a mask on the 10th day
The U.S. Centers for Disease Control and Prevention (CDC) just released guidance on what to do within 10 days of testing positive for COVID-19:

– Asymptomatic F0 is only required to isolate for 5 days from the date of positive test result.

– Symptomatic F0 may not require isolation if recovered after 5 days and no fever within 24 hours.

– When no longer quarantined, it is recommended that F0 continue to wear a mask until the 10th day from the date of illness.

However, F0s can still test positive for COVID-19 for up to 3 months after contracting the virus, according to the CDC. In this case, what is the recommended method of isolation? Does a persistent positive result mean you are still not cured? Here’s what you need to know.

F0 is usually positive within a few days?
American clinical virologist Dr Matt Binnick said most F0 antigen or rapid test results were positive for up to 10 days. However, some people can get a positive result for up to 2 months when they have a PCR test.

Based on information provided by the CDC, the CDC updated its quarantine guidelines in August 2020 to specify that F0s can continue to test positive for COVID-19 for up to 3 months after diagnosis. But first, if they’re perfectly healthy and asymptomatic, they won’t infect those around them.

The difference between how long a test and a positive result last depends on the type of test and its sensitivity.

PCR tests look for viral RNA, or the virus’ genetic material, said David Dowdy, an expert at the Johns Hopkins Bloomberg School of Public Health.

“Even after the virus dies, the RNA is still there, so you can get false positives (for PCR tests) for up to 2 months after infection,” Dr. Dowdy said. “While this is not a common situation, it is a possibility.”

Meanwhile, antigen tests, also known as rapid home tests, typically look for proteins specific to the virus.

According to the CDC, most F0s will continue to test positive for COVID-19 even after symptoms return, so there is no need to worry about potentially spreading the virus to others. However, caution should be exercised for people with weakened immune systems or those with severe COVID-19 symptoms who test positive for the virus.

“Some people, especially those who are immunocompromised, can still infect others for extended periods of time, especially if they continue to experience symptoms,” explains Binnick. According to Dr. Dowdy, this is due to “the inability of the immune system to effectively clear the virus, which may also result in a more negative F0 than usual.

For this situation, the CDC also recommends a quarantine period of up to 20 days for people who are immunocompromised or have severe COVID-19 symptoms. Those individuals are also advised to get tested for COVID-19 if they decide to isolate and reintegrate into the community to avoid infecting others.

F0 symptoms are cured, but still positive, what should I do?
As recommended by the CDC and U.S. health experts, once you test positive for COVID-19, you do not need to retest for F0 after 5 days.

After 5 days, you should repeat the test to decide whether to end the home isolation period.

– If positive, F0 should quarantine for another 5 days.

– People who are immunocompromised or have severe COVID-19 symptoms may also be tested at the end of the quarantine period.

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