One coronavirus infection wards off another — but only if it's a similar variant - Nature.com

Infection with a pre-Omicron SARS-CoV-2 variant protects against reinfection with a second, although the effect fades almost completely after three years.

A masked pedestrian in Australia, where people have been warned that they are at risk of catching SARS-CoV-2 again four weeks after a first coronavirus infection.Credit: Lisa Maree Williams/Getty Na… [+4111 chars]

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