Alejandra and Marisol Gerardo are nine years old but already making a little bit of history. The twin sisters are among the first young children to get vaccinated with a COVID-19 shot in Pfizer-BioNTech’s study of its vaccine in kids under age 12.
Alejandra and Marisol had their blood drawn in the morning on March 24, then got their first dose of the two-dose vaccine later that afte…
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