It remains crucial that variants be tracked, yet scientists question how quickly the next variant of concern will be detected as many countries wind down surveillance efforts.
...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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