Ari Blank got a comforting hand-squeeze from his mom in May as he was vaccinated against COVID-19 in Bloomfield Hills, Mich. This week, the Food and Drug Administration authorized the use of Pfizer's vaccine in even younger kids — ages 5 to 11. Jeff Kowalsky/AFP via Getty Images hide caption
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Marcelina Alvarez, a technician at Montefiore Medical Center in the Bronx, administers an EKG to Israel Shippy to check the functioning of his heart. Fred Mogul/ WNYC hide caption