What is the age cut off for boosters?

[Anonymous]

Hello, is there an age where one no longer needs an H1n1 booster? Is there a difference if you get the mist vs. the shot, as to whether or not one needs a booster? Thanks.

[Anonymous]

Kids ages 9 and under need 2 doses of the H1N1 vaccine (it does not matter if theyt got the shot or the mist - they still need 2 doses 3-4 weeks apart).