What we know so far about the effort to vaccinate children

To achieve herd immunity, experts say kids need to get vaccinated, reducing the virus's ability to spread.

Millions of parents breathed a collective sigh of relief this week as the preliminary results of the Pfizer/BioNTech COVID-19 vaccine trial in 12 to 15 year-olds revealed what so many had been hoping for: The vaccine works in teens too.

“Jubilation—that was my response,” says Nia Heard-Garris, an attending pediatrician at Lurie Children’s in Chicago and assistant professor of pediatrics at Northwestern University Feinberg School of Medicine—and a parent herself. She wasn’t the only one feeling that way.

With nearly a third of the country having already received at least one dose of a COVID-19 vaccine and more than 2 million vaccinations occurring every day, the cloud of anxiety that has plagued the nation

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