(Reuters) – Colorado began requiring dairies to test milk supplies for bird flu every week, the state’s veterinarian told Reuters on Tuesday, as a federal team arrived to help investigate an escalating outbreak in cows that has spread to chickens and people.

The state’s new mandate aims to identify additional farms that could be infected and spread the disease to other dairies or poultry flocks, after the largest cluster of human cases to date in the United States occurred on a Colorado farm this month. (Read More)