New bird flu strain detected in Nevada dairy worker, CDC says --First cow-to-human case of D1.1 avian flu strain is confirmed | 11 Feb 2025 | A new type of bird flu has been detected in a human dairy worker in Nevada. This strain is different from the version that's been spreading in herds since last year, according to the Centers for Disease Control and Prevention (CDC). The case was apparently mild, as the Churchill County dairy worker was not hospitalized and has recovered, The Associated Press reported, citing health officials. While the new bird flu strain, D1.1, has been reported in more than a dozen humans exposed to infected poultry, this is the first cow-to-human case.