Bird flu infections in dairy cows are more widespread than we thought, according to a new CDC study - Bird flu strain that just jumped to cows infects dairy worker in Nevada - Dairy cows infected with second version of bird flu - Bird flu: What's the latest on US outbreak as dairy cattle cases continue to spread? - Dairy cows inoculated with highly pathogenic avian influenza virus H5N1 - Avian flu has infected dairy cows in more than a dozen states--a microbiologist explains how the virus is spreading - US to survey dairy cattle brought to slaughter to study bird flu infections - Bird flu risk is restricted to those who work with dairy cattle -- for now - Bird flu outbreak in dairy cattle: Minnesota reports first infected herd - Third human case of bird flu tied to dairy cattle outbreak