H7N9 avian influenza: China
The China National Health and Family Planning Commission reported an additional 28 human cases of avian influenza A(H7N9), including four deaths, for the period of February 13 to 23. The 22 male and six female patients aged from four to 81 had their onset from January 27 to February 17.
Seoul virus: North America
In a follow-up on the multistate Seoul virus outbreak in the United States, the Centers for Disease Control and Prevention (CDC) reports laboratory-confirmed infection in 16 people in nine states as of Feb. 23.