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  2. Why you have COVID symptoms and a negative test: You ... - AOL

    www.aol.com/finance/why-covid-symptoms-negative...

    If you were exposed to COVID, test at least 5 full days after exposure. If you test negative using an at-home test, repeat the test again in 48 hours. If you still test negative, wait 48 more ...

  3. Got a Faint Line on a COVID-19 Home Test? Here's What ... - AOL

    www.aol.com/got-faint-line-covid-19-145700240.html

    A false positive isn't as likely as a false negative result on a home test early in a person's infection, explains Sandra H. Bonat, M.D., a pediatric expert and virologist with VIP StarNetwork, a ...

  4. You can still be contagious with COVID if you have a negative ...

    www.aol.com/news/still-contagious-covid-negative...

    If you get two negative at-home COVID test results 48 hours apart after previously testing positive, you are likely no longer contagious. But how long that will take is "wholly dependent on the ...

  5. Transmission of COVID-19 - Wikipedia

    en.wikipedia.org/wiki/Transmission_of_COVID-19

    The transmission of COVID-19 is the passing of coronavirus disease 2019 from person to person. COVID-19 is mainly transmitted when people breathe in air contaminated by droplets/aerosols and small airborne particles containing the virus. Infected people exhale those particles as they breathe, talk, cough, sneeze, or sing.

  6. COVID-19 testing - Wikipedia

    en.wikipedia.org/wiki/COVID-19_testing

    Accuracy is measured in terms of specificity and selectivity. Test errors can be false positives (the test is positive, but the virus is not present) or false negatives, (the test is negative, but the virus is present). [179] In a study of over 900,000 rapid antigen tests, false positives were found to occur at a rate of 0.05% or 1 in 2000. [180]

  7. Diagnosis of tuberculosis - Wikipedia

    en.wikipedia.org/wiki/Diagnosis_of_tuberculosis

    A meta-analysis with 1,595 inpatients and outpatients showed 70% sensitivity and 90% specificity for TB diagnosis in people living with HIV for Fujifilm SILVAMP TB LAM. [40] As of 2020, the test showed a high positive predictive value (95.2%) in HIV-negative outpatients. [41] Large prospective studies are on the way. [42]

  8. Yes, You Can ‘Test Out’ Of COVID Isolation—Here Are The Rules

    www.aol.com/yes-test-covid-isolation-rules...

    How long are you going to test positive for COVID after taking a test? Two experts weigh in, and advise on testing and isolation guidelines to follow. Yes, You Can ‘Test Out’ Of COVID ...

  9. What should you do if you’re still testing positive for COVID ...

    www.aol.com/news/still-testing-positive-covid-19...

    In the event that your test is negative even though you have noticeable COVID-like symptoms or you were exposed to someone with a confirmed case, the FDA now recommends taking a second test two ...