Pivotal, Multicenter, Observer-Blind, Randomized Study of Influenza A (H1N1)2009 Monovalent Subunit Vaccine With and Without Adjuvant in Children Ages 6 to <36 Months

3.75 µg A/H1N1 antigen with 50% MF59 adjuvant administered on study day 1 and day 22.

7.5 µg A/H1N1 antigen without MF59 adjuvant administered on study day 1 and day 22.

15 µg A/H1N1 antigen without MF59 adjuvant administered on study day 1 and day 22.

7.5 µg A/H1N1 antigen with 50% MF59 adjuvant administered on study day 1 and day 22.