A second case of bird flu has been found in a human, US health authorities announced Wednesday, less then two months after the first one as an outbreak of the disease circulates widely among dairy cows. A second case of bird flu has been found in a human, US health authorities announced Wednesday, less then two months after the first one as an outbreak of the disease circulates widely among dairy cows. Veterinary medicine Agriculture Phys.org – latest science and technology news stories