WASHINGTON — The Food and Drug Administration on Wednesday restricted access to COVID-19 vaccines by ending their emergency authorization and refining eligibility standards to exclude most healthy adults and children.

Health and Human Services Secretary Robert F. Kennedy Jr., a skeptic of vaccine safety, said in a statement that new policies were rooted in “science, safety, and common sense.”

Under the new rules, people over age 65 will remain eligible to get vaccines, but younger adults will need to establish they have an underlying condition such as asthma or obesity that puts them at higher risk for the illness.

Health and Human Services Secretary Robert F. Kennedy Jr. announced new COVID-19 vaccine policies Wednesday. Getty Images

That potentially eliminates access among broad s

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