Booster — Dose

Protection can begin to wane 4–6 months after your primary series.

Some evidence suggests that "heterologous" boosting (getting a different brand than your original shot) can elicit a higher immune response in certain cases. booster dose

While boosters provide substantial protection against severe cases, protection against symptomatic infection can begin to decrease after a few months, making timing critical. Protection can begin to wane 4–6 months after