Federal health officials say Covid-19 vaccines are working well. Yet they also say studies are showing that even vaccinated people are more likely to become infected now, so they are laying plans now for providing boosters, if regulators give the go-ahead
It sounds confusing -- federal health officials say the Covid-19 vaccines are working well, providing more than 90% protection against severe disease and death. They're keeping people out of the hospitals.
Yet they also say studies are showing that even vaccinated people are more likely to become infected now, so they are laying plans now for providing boosters, if federal regulators give the go-ahead.How can both be true?It's because of a triple whammy of naturally waning immunity, a fast moving new variant, and a population that's been slow to get vaccinated in the first place.
That's what herd immunity is about -- when enough people are immune to infection that a virus stops circulating. This usually only happens with widespread vaccination. The US Food and Drug Administration and the Centers for Disease Control and Prevention must make the decision to give people booster shots, but White House officials said they wanted to have a plan ready to go if and when that happens.
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