COVID-19 vaccination was effective in children, adolescents during 2021
A large study of U.S. children and teens who received the Pfizer/BioNTech COVID-19 vaccine finds that it was effective through much of 2021, but waned over time, especially as the omicron variant became dominant in 2022. Teens who received a booster dose regained some protection.
COVID-19 vaccination of mother during pregnancy protects infant, though protection wanes
Being vaccinated against COVID-19 during pregnancy provides protection for the baby through its first several months of life, a Kaiser Permanente analysis finds. Protection was stronger against the delta variant than the more recent omicron variant.