'It's a follow-up dose of a vaccine; one should be given at age 2 & another before entering school'
a booster
BOO!: Its a follow-up dose of a vaccine; one should be given at age 2 & another before entering school
It's a follow-up dose of a vaccine; one should be given at age 2 & another before entering school
It's a follow-up dose of a vaccine; one should be given at age 2 & another before entering school
"BOO"!
a booster
"BOO"!