2nd human infected with H5N1 bird flu in U.S., CDC says
A Michigan farm worker has been diagnosed with bird flu, becoming the second U.S. case tied to dairy cows.
![2nd human infected with H5N1 bird flu in U.S., CDC says](https://i.cbc.ca/1.4872258.1716406691!/cpImage/httpImage/image.jpg_gen/derivatives/16x9_620/canceled-climate-conference.jpg)
![FILE - In this Oct. 8, 2013, file photo, a sign marks the entrance to the federal Centers for Disease Control and Prevention (CDC) in Atlanta. The canceled federal conference on climate change and health problem is back on but apparently minus the federal government. Former Vice President Al Gore, the University of Washington, the Harvard Global Health Institute and the American Public Health Association are resurrecting a climate change and health conference set for next month that the Centers for Disease Control and Prevention had planned then canceled in December. A sign marks the entrance to the federal Centers for Disease Control and Prevention (CDC) in Atlanta.](https://i.cbc.ca/1.4872258.1716406691!/cpImage/httpImage/image.jpg_gen/derivatives/16x9_620/canceled-climate-conference.jpg)
A Michigan farm worker has been diagnosed with bird flu, becoming the second U.S. case tied to dairy cows.