Six Colorado workers contracted bird flu, the most human cases in a state - The Washington Post
- Six Colorado workers contracted bird flu, the most human cases in a state The Washington Post
- More People Test Positive For Bird Flu In US The Weather Channel
- Colorado bird flu cases show how extreme heat may be complicating efforts to control the virus CNN
- Officials probe heat-wave factors in H5N1 spread to Colorado poultry cullers University of Minnesota Twin Cities
- Five agricultural workers in northeastern Colorado have now tested positive for bird flu Colorado Public Radio