But if you add in a booster, they start behaving or looking like they did right after you got your first round of vaccination. And they're showing that the antibody levels are declining over time. They take blood samples over time, and they see how their antibody level's doing when they challenge them with a virus in the laboratory. And then there's laboratory data where they look at people's blood. Then there's a paper from Israel out this week that says that boosters reduce the likelihood of any disease, including severe disease, in that group and others.
But there's also some evidence that the vaccine's ability to prevent severe disease is declining, at least for people older than 65. And it's any kind of infection, even mild disease. So the longer it's been since you got vaccinated, the more likely you'll get a breakthrough infection. PALCA: So it's primarily evidence from Israel that over time, the vaccine's ability to prevent any disease begins to decrease.
KING: What are the arguments in favor of boosters for all? KING: NPR science correspondent Joe Palca is following this one. But some scientists aren't so sure that everyone needs one. President Biden has already said he wants boosters. Yeah, an advisory committee to the Food and Drug Administration is meeting to consider Pfizer's application to offer a third shot to all Americans older than 16. Today might be the day that determines the future of COVID-19 booster shots in this country.
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