Recent influenza pandemic was due to which strain?

Influenza us cause by Ohomyxovirus 3 types: A, B, C - Type A:MC cause of outbreaks/ epidemics; only cause of pandemics Examples: H1 N1 (Type A) - Cause of Swine flu -Recent influenza pandemic H2 N2 (Type A) H5 N1 (Type A) -Cause of An influenza (Bird flu)