Avian influenza, or bird flu, refers to the disease caused by infection with Type A viruses. The Alabama Department of Public Health reports these viruses occur naturally among wild aquatic birds ...
In the early 20th century, outbreaks of bovine tuberculosis were responsible for tens of thousands ... To obtain one, the cows and the milk itself must be rigorously and regularly tested for diseases ...
The H5N1 avian flu has spread from birds to dairy cows, causing significant outbreaks and posing risks to farm workers and other animals, though pasteurized milk remains safe.