Bird flu has ripped through the animal kingdom for the past few years now, killing countless birds and crossing into an alarming number of mammals. Yet people remain largely untouched. Even though ...

So far, 70 human cases have been confirmed, according to the CDC. Bird flu is continuing to spread in animals across the United States more than a year after the first human case was detected.

As the H5N1 bird flu virus mutates and rapidly spreads through American cattle herds — a first for the U.S. — doctors and veterinarians are fearful that if the virus is left unchecked ...