The difference between a vaccine and a booster is the time it is given. A vaccine is primarily referred to as the first dose of a medicine to prevent disease. A booster is a dose given after the initial dose to strengthen the effect of the first dose.

Normally, you would get a booster shot in your arm.

lots or none

A Booster raises money for a cause.

OR A Booster shot is used to build up immunity to protective levels.

if previous dose date known booster dose every 5 th year.