US reports fourth case of bird flu in humans

Colorado dairy worker recovers as officials work toward vaccines and offer farmers financial aid

The US announced its fourth human case of bird flu, in a Colorado dairy worker, on Wednesday, as officials work to expand the availability of potential vaccines and commercial tests and open up financial assistance for affected farmers.

The dairy worker was in close contact with cows that had tested positive for H5N1, a highly pathogenic bird flu, and the worker reported only eye symptoms", according to the Centers for Disease Control and Prevention (CDC).