Pfizer-BioNTech and Moderna vaccine metrics, by age group

Due to differences in when and how the studies were conducted—as well as differences in efficacy definitions—the data presented in this chart are not directly comparable.

Efficacy numbers for Pfizer ages 5-17 are not with a booster.
Series, dosage and booster metrics from CDC and FDA. Efficacy taken from FDA documents when possible, with the exception of these groups, which are based on single studies:

Pfizer, ages 5-17: New England Journal of Medicine
Pfizer, ages 18+: New England Journal of Medicine
Moderna, ages 18+: National Institutes of Health
TIME