booster dose

Early reports flagged a type of heart swelling called myocarditis as a rare side effect of the mRNA vaccine, particularly for young men ages 18 to 25 after a booster dose.

R21/Matrix-M, developed by the Jenner Institute at Oxford University, uses three doses administered four weeks apart and a booster dose given after one year.

Eligible groups were offered two main doses as a minimum, plus a booster dose, with additional boosters for more vulnerable groups later on in the pandemic.

And California officials require a booster dose for students entering seventh grade.

Similarly, if you qualify but missed an earlier booster dose, you can have another jab this spring to catch up.