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A Covid-19 testing site stands on a Brooklyn street corner in April. Spencer Platt/Getty Images hide caption

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Spencer Platt/Getty Images

The Coronavirus Crisis

A new dominant omicron strain in the U.S. is driving up cases — and reinfections

July 11, 2022 • BA.5 is now the dominant omicron strain in the U.S. It's good at evading the immune system, though doesn't appear to cause more serious illness.

A new dominant omicron strain in the U.S. is driving up cases — and reinfections

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Coronavirus FAQ: I got COVID. Then I got it again. What's the deal with reinfection?

A positive result on a home COVID test. If you catch it once, can you catch it again? Turns out the answer is: Yes. Jakub Porzycki/NurPhoto via Getty Images hide caption

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Jakub Porzycki/NurPhoto via Getty Images

Goats and Soda

Coronavirus FAQ: I got COVID. Then I got it again. What's the deal with reinfection?

June 6, 2022 • People who catch COVID may feel as if they won't get it again, at least not for a long time. Their immune system should be primed to fight it off in the future. Right? Well, let's see.