The 2011-2012 influenza season was one of the mildest and latest on record, with lower percentages of outpatient visits for flu-like illness, lower rates of hospitalization and fewer deaths attributed to flu and pneumonia, according to CDC. During the season, influenza activity peaked in mid-March, and influenza A (H3N2) viruses were most commonly reported overall. FDA's Vaccines and Related Biological Products Advisory Committee recommended that the 2012-2013 trivalent influenza vaccine for the U.S. contain A/California/7/2009-like (pH1N1), A/Victoria/361/2011-like (H3N2), and B/Wisconsin/1/2010-like (B/Yamagata lineage). MMWR Article