Influenza vaccine H1N1, 2 injections in children of 9 years and younger

The Bulletin of the National Institute of Allergy and Infectious Diseases of November 2nd, 2009 gives recent results concerning H1N1 2009 influenza vaccination of children 9 years of age and younger.

The doses of 15 and 30 micrograms give approximately the same results; the dose of 15 micrograms is thus to privilege.

The second injection gives an important immune response whereas one injection, whatever the dose 15 or 30 micrograms, gives only a low response. Two Injections are thus recommended.

In children of more than 10 years and in adults only one injection seems to be enough.

Complementary results will be given later on by this Institute.