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How COVID shots for kids help prevent dangerous new variants

Cadell Walker comforts her daughter Solome, 9, as nurse Cindy Haskins administers a Pfizer COVID-19 shot at a vaccination clinic for young students at Ramsey Middle School on Saturday, Nov. 13, 2021 in Louisville, Ky. Scientists say vaccinating kids against COVID-19 should not only slow the spread of the coronavirus but also help prevent potentially-dangerous variants from emerging. Each new infection brings another opportunity for the virus to mutate and evolve dangerous new traits. (AP Photo/Laura Ungar)