Families can now schedule Pfizer-BioNTech booster shots (fourth vaccine doses) for moderately and severely immunocompromised children age 5-11 at least three months after their third dose.
The booster dose is separate from the initial vaccine series for this group of children, which includes three initial shots given over a period of seven weeks.
Booster shots are known to provide renewed protection against COVID-19, as research has shown that like vaccines for other illnesses, the protection from the primary COVID-19 vaccine series wanes over time (especially as new variants emerge). Boosters are especially important for children with weakened immune systems, as they are often more at risk than others for contracting COVID-19 and becoming severely ill.