Alarm as bird flu now 'endemic in cows'
(theguardian.com)
A newer variant of H5N1 bird flu has spilled over into dairy cows separately in Nevada and Arizona, prompting new theories about how the virus is spread and leading to questions about containing the ongoing outbreaks.
A newer variant of H5N1 bird flu has spilled over into dairy cows separately in Nevada and Arizona, prompting new theories about how the virus is spread and leading to questions about containing the ongoing outbreaks.