Bird flu H5N1: first infection from cow to human?. As of: April 5, 2024, 12:10 p.m By: Anna Kirschner CommentsPressSplit A case in Texas may be the first transmission of the H 5N1 bird flu virus from cows to humans.

This may require a reassessment of risk. The CDC does not plan to change its risk assessment for H5n1 in humans. However, people who have close or long-term contact with infected birds or animals are at slightly higher risk.