Avian influenza: 2 waves, different routes and changing dynamics

Devastating outbreaks of the avian influenza virus hit the United States in 2022. In the first half-year of 2022, there was still a certain resemblance to what happened in 2015, but the further course of the epidemic showed significant differences. Two waves with changed dynamics resulted in 306 outbreaks with a loss of more than 57 million birds. While it was still assumed in June 2022 that the outbreaks would follow the pattern observed so far and that there would be no or only a few cases