 The Centers for Disease Control and Prevention officially signed off on allowing children as young as 5 years old to get an updated COVID-19 booster shot. CDC Director Rochelle Walensky signed the decision memo on Wednesday afternoon, the same day that the Food and Drug Administration expanded the authorizations for Moderna Inc. MRNA, 7.75 and BioNTech SE BNTX, 4.97 Pfizer Inc.s PFE, 0.66 updated COVID-19 boosters. 