The objective of the present study was to determine whether the morbidity rates of the 2009 pandemic influenza A H1N1 virus (pdmH1N1) varied by age and/or sex.
Eshima, N., Tokumaru, O., Hara, S., Bacal, K., Korematsu, S., Tabata, M., … Matsuishi, T. (2011). Sex- and age-related differences in morbidity rates of 2009 pandemic influenza a H1N1 virus of swine origin in japan. PLoS ONE, 6(4). https://doi.org/10.1371/journal.pone.0019409