By September 2020, just six months after COVID-19 triggered shutdowns across the U.S., it was clear that SARS-CoV-2, the virus that causes COVID-19, had mutated from its original form.
COVID-19 rapid tests still work against new variants—researchers keep 'testing the tests,' and they pass, analyzed the effectiveness of more than 100 rapid antigen test kits on over 300 variants. The vast majority of the kits were able to detect new as well as prior previously known variants.for their accuracy and performance. We understand why the public may still have questions about whether these tests are reliable, particularly as new variants continue to appear.
Rapid antigen tests are relatively inexpensive, can be used without prior training and give quick results, typically within 10 or 15 minutes. One drawback is that they are less accurate than PCR tests, especially early in an infection when there is less virus present in the body.as they did earlier in the pandemic, when different variants were circulating—even though our initial study was completed in January 2022.
But there are some exceptions to this general rule. It's possible to be infected, have no symptoms and be contagious. This is especially true early on in a person's infection.The best advice is to follow the instructions that come with your test. For antigen tests in the U.S., this means taking a swab of your nose.swabbed the throat, the same study said that when a person swabbed themselves, nose samples were more accurate than throat samples. Other studies have shown.
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