Please lets not make this a political skirmish....
I've noticed that there are a fairly large number of questions/misunderstanding about covid testing. Often it sounds like "The rapid test came up negative and the PCR test came up positive."
The misunderstanding is generally due to not knowing what the type of test was meant to be used for.
The following two statements are interpreted similarly by some folks but they are not the same:
- A rapid test is meant to discern whether someone is contagious.
- A PCR test is meant to discern whether someone had or has the virus.
Someone could have the virus and correctly come up negative on a rapid test because they are not shedding enough virus to be contagious. This typically happens to people who are in the early stages and/or asymptomatic, and are fully vaxxed. It also happens to those who are symptomatic and vaxxed but also aren't shedding the virus enough to come up contagious.
The PCR test is used to see if a person has or had the virus but doesn't test for contagiousness so its possible to come up positive on a PCR test but come up negative on a rapid test.
Summary: To see if you are infected, take a PCR. Wondering if you’re still contagious? Take a rapid test.
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1. If you can’t get a PCR, take two rapid tests two days apart.
While the PCR is the gold standard for testing, if you can’t get one, two rapid antigen tests spaced 48 hours apart are an acceptable alternative, says Matthew Binnicker, Ph.D., Medical Director of the Clinical Virology Laboratory at the Mayo Clinic in Rochester, Minnesota.
If you have Covid symptoms like fever, cough, sore throat, runny nose or congestion, but test negative, he recommends that you take a second at-home test in 24 to 48 hours.
“If both tests are negative and symptoms persist or get worse, seek out PCR testing for both Covid-19 and influenza,” he says. If you don’t have symptoms, but want to test after you’ve been exposed, do it on your third and fifth days post-exposure, Binnicker adds.
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