The full-dose Pfizer COVID-19 vaccine is already authorized for use in kids as young as 12 in the US, but public health officials have been working toward granting similar authorizations for vaccinating younger kids. A new study published today reveals that Pfizer’s “kid-dose” COVID-19 vaccine offers youth ages 5 through 11 years around 91-percent protection against symptomatic SARS-CoV-2 infections. The …