The Food and Drug Administration is taking a new approach to COVID-19 vaccines that would prioritize immunizations for people at highest risk for serious complications from the disease but could make it harder for many other people to get the shots.

The new strategy would continue the current vaccine approval process for people ages 65 and older and younger people with health problems that put them at high risk, according to an article published Tuesday in The New England Journal of Medicine. But the FDA will now require vaccine manufacturers to conduct additional large studies to evaluate the safety and effectiveness of the vaccines for children and younger healthy adults.

"We have launched down this multiyear campaign of booster after booster after booster and distrust of the Ame

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