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When should you perform Covid-19 test after exposure with F0

When should you perform Covid-19 test after exposure with F0

11/30/2021 10:19:50 AM

Covid-19 is showing signs of raising again throughout the country. F0 in businesses and communities is about increasing. So when is the best time to test for Covid-19 to give the most accurate results after exposure to F0?

According to the US Centers for Disease Control and Prevention - CDC recommends considering the time to perform testing after exposure following cases:

  • Fully vaccinated people should be tested 5–7 days after their last exposure.
  • People who are not fully vaccinated should get tested immediately when they find out they are a close contact. If their test result is negative, they should get tested again 5–7 days after their last exposure or immediately if symptoms develop.
  • For people who have not got vaccine: the earliest possible time to give a positive result is about 24 to 48 hours.
  • For people with symptoms, if antigen rapid test is negative, take the second test after 24 to 48 hours later. If the results continue negative, RT-PCR should perform.

In addition, while waiting for testing, people, whether or not vaccinated, still need to self-isolate, avoid contact, and ensure the 5K rule so as not to infect others.

Current vaccines, although highly effective, do not eliminate 100% of the risk of infection. Even though an infected person has no symptoms, he or she can still infect others. Studies show that about 59% of people infected with F0 are asymptomatic, according to Verywell Health.

Source: HCDC, Thanh Nien Newspaper

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