U.S. health officials may soon recommend COVID-19 booster shots for fully vaccinated Americans. Here’s a look at what's known about the boosters and what questions remain.
FILE - In this April 8, 2021, file photo, registered nurse fills a syringe with the Johnson & Johnson COVID-19 vaccine at a pop up vaccination site in the Staten Island borough of New York. Researchers and health officials have been monitoring the real-world performance of the COVID-19 vaccines to see how long protection lasts among vaccinated people.
It’s common for protection from vaccines to decrease over time. A tetanus booster, for example, is recommended every 10 years. But laboratory blood tests have suggested that antibodies — one of the immune system’s layers of protection — can wane over time. That doesn’t mean protection disappears, but it could mean protection is not as strong or that it could take longer for the body to fight back against an infection.
Officials are continuing to collect information about the one-shot Johnson & Johnson vaccine, which was approved in the U.S. in late February, to determine when to recommend boosters.The first people vaccinated in the United States would likely be first in line for boosters too.
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