Fig. 2

Spatial distribution and temporal progression of affected commercial flocks and cattle herds by state from January 2022 to September 2024. The graph tracks the number of affected herds and flocks across various states, including notable peaks in states such as California, Iowa, Minnesota, and South Dakota. The data highlights the variability of outbreaks over time, with different states showing varying levels of impact. The color-coded bars represent the cummulative number of affected commercial flocks and cattle herds, for each state illustrating the widespread nature of the outbreaks across the United States. Even though spread in herds has begun only recently, the propagation has been faster than for flocks. The spatial distribution of affected farms is very different depending on the type of animals