The vaccine doesn't guarantee lifetime immunity, but it does greatly reduce the risk of someone developing chickenpox or having a bad case.
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Yet, until now, the United States never installed an outspoken vaccine critic like Robert F. Kennedy Jr. as a top health official with the power to upend federal childhood vaccine recommendations. Health and Human Services Secretary Kennedy and other top officials in the Trump administration have waged an “unprecedented attack on the nation’s evidence-based childhood immunization schedule,” a lawsuit, filed by 15 states, charged on Tuesday. Their actions will make people sicker and strain state resources, the suit claims.
Rebecca Morelle, Alison Francis and Greg BrosnanBBC Science