How many doses of vaccine are required?
The Federal Drug Administration (FDA) approved and preliminary clinical trials data support: • One dose of H1N1 vaccine for persons 10 years of age and older • Two doses of H1N1 vaccine for children 3-9 years of age • Children aged 6 months through 35 months get two doses of H1N1 vaccine that contains one-half the dose used for older children and adults.