evidence: CDC recommended that children 5–11 years old should receive a booster shot five months after their initial Pfizer-BioNTech vaccination series, strengthens its recommendation that those 12 and older who are immunocompromised and those 50 and older should receive a second booster dose at least four months after their first. May 19, 2022 [...] CDC published ACIP interim recommendations for using Pfizer-BioNTech COVID-19 vaccine in children 5–11 years old. November 5, 2021 FDA authorized EUA for Pfizer-BioNTech COVID-19 vaccine for children 5–11 years old. October 29, 2021