H5N1 bird flu is here. It’s moving from animals to people in ways not seen before. It’s spreading to new species and new places, and this spread is largely happening under the radar.So far 36 human cases have been reported in six U.S. states: California, Colorado, Michigan, Missouri, Texas and Washington. Those are just the cases that health officials know about. Not all states are testing people or animals. The tests for the virus are flawed and in short supply.Most health officials say they are not really worried about H5N1…