Experts have a few theories on why some people may be getting false negatives when they believe they have COVID.
By now, with the many waves of COVID-19 infections we’ve endured, you may know someone who’s tested negative on an at-home COVID test only to test positive at an urgent care clinic or doctor’s office.
To his team, this is good news when it comes to our rapid tests. “The way the tests have performed with previous omicron subvariants, we would expect that they would perform very similarly with XBB,” Lam told HuffPost.There aren’t any studies or pre-print reports currently available on how effective rapid tests are with XBB, but scientists predict that at-home tests will continue to work well with the latest crop of variants.
On the whole, COVID tests aren't going to be affected by changes in variants. However, experts have a few theories why many people are getting false negatives right now.First, repeat testing is crucial, and taking a single test isn’t the most reliable way to determine if you’re infected. If you have symptoms, you shouldat least twice 48 hours apart; if you don’t have symptoms, do three tests 48 hours apart.
People who test negative on an at-home test but positive at the doctor’s office may just have a low viral load. PCR tests or more sensitive lab tests conducted at a doctor’s office can detect lower levels of virus compared to the at-home tests. This possibility is looking more and more likely, especially as we enter the era in which the vast majority of people have either been vaccinated multiple times or infected, also potentially multiple times.
If you’re not at risk and are doing fine with mild symptoms at home, Lam recommends waiting a couple of days, then checking in with your doctor if you still feel crummy. No matter what — even if your symptoms are mild and you feel like you’re recovering — getting tested at a clinic or pharmacy can’t hurt, especially before being around other people.
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