Back in November 2020, one study suggested people who contracted Covid-19 and recovered might be immune to reinfection for years or even decades. It’s now clear that won’t be the case because of rapidly changing variants, writes Melody Schreiber.
Switch to the dark mode that's kinder on your eyes at night time.
Switch to the light mode that's kinder on your eyes at day time.
Switch to the dark mode that's kinder on your eyes at night time.
Switch to the light mode that's kinder on your eyes at day time.
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