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.
...researchers have found that viruses that surge in the winter, including influenza viruses and SARS-CoV-2 — the coronavirus that causes COVID-19 — survive best when the relative humidity in the air falls below about 40 percent.
Exactly how long protection lasts after a COVID infection isn’t one-size-fits-all. A few factors make it impossible to say exactly how long you’re protected from reinfection.
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