Natural Immunity: What to Know
Natural immunity is a subtype of active immunity. Here’s what you need to know about how it’s acquired and how it protects you.
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Natural immunity is a subtype of active immunity. Here’s what you need to know about how it’s acquired and how it protects you.
Roadblock no. 1 to herd immunity: COVID-19 variants First of all, let's talk about the variants. "Viruses mutate constantly, so most mutations do nothing," said Wachter. "What we're seeing now with the U.K., the Brazilian and the South African variant is interesting, because it shows that variants can change in all sorts of ways. They can make (viruses) more infectious, they can make them more serious -- meaning equally infectious, but if you happen to get it you're likely to get sicker -- and/or they can make them resistant to immunity." Any or all of those things are concerning because they...