Nature Reviews Microbiology 13, 399 (2015)
Viral evolution: Global patterns of influenza circulation
Christina Tobin K?hrstr?m.
Understanding the factors that influence the circulation of seasonal influenza viruses is a major public health challenge. By analysing 9,604 viral haemagglutinin (HA) sequences from the 2 influenza A subtypes H1N1 and H3N2, and the 2 influenza B viruses Yamagata and Victoria (all of which