Parents in the United States who want to vaccinate their young children against Covid-19 may face a growing set of challenges this fall.

The US Food and Drug Administration might not renew authorization for Pfizer’s Covid-19 vaccine for children younger than 5, the US Centers for Disease Control and Prevention told state and local health officials on Friday.

“This decision would affect Pfizer’s pediatric COVID-19 vaccine for children aged 6m–4y for the 2025–2026 season,” the CDC’s National Center for Immunization and Respiratory Diseases said in an email that was obtained by CNN.

In May, US Health and Human Services Secretary Robert F. Kennedy Jr. announced that the CDC would no longer recommend Covid-19 vaccines for healthy children or pregnant women. The CDC’s immunization schedul

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