Weekly updates on A(H5N1) bird flu response activities led by CDC are posted online, with the latest update available at CDC A(H5N1) Bird Flu Response Update June 28, 2024 | Bird Flu | CDC. Among the updates is information on Michigan’s H5N1 bird flu seroprevalence study of individuals exposed to sick cows. CDC is providing technical assistance on the study, which aims to determine if there has been asymptomatic infection with H5N1 bird flu among people who have worked with sick cows, if certain jobs might increase risk of exposure, and how personal protective equipment can protect against infection. A summary of all of CDC’s H5N1 response activities can be found at News & Spotlights | Bird Flu | CDC.