Agricultural and geographic factors shaped the North American 2015 highly pathogenic avian influenza H5N2 outbreak

The 2014 – 2015 highly pathogenic avian influenza (HPAI) outbreak, across the midwest, was the largest and most expensive HPAI outbreak in the US, and still factors associated with the spread of HPAI among the poultry premises remain unclear. 

Influenza H5/H7 Virus Vaccination in Poultry and Reduction of Zoonotic Infections, Guangdong Province, China, 2017–18

Researchers compared the detection frequency of avian influenza H7 subtypes at live poultry markets in Guangdong Province, China, before and after the introduction of a bivalent H5/H7 vaccine in poultry, finding a 92 percent reduction in H7 positivity rates among poultry and a 98 percent reduction in human H7N9 cases.