...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.
Because XBB is relatively new, scientists are still working to figure out if and how the variant behaves differently from other recent variants. Though XBB’s symptoms are expected to be on par with past omicron infections, doctors say they are seeing some issues becoming more prevalent than others.
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