(VIDEO) Mayo Clinic virologist explains concern about avian flu and why flu vaccine is important

For the first time in the U.S., H5N1 avian influenza, commonly known as the bird flu, has been detected in a pig. The virus is widespread among wild birds globally. It continues to cause outbreaks in American poultry and dairy cows, and it has infected humans. The Centers for Disease Control and Prevention reports 46 confirmed human cases of bird flu in the U.S., all linked to animal exposure with “no evidence of human-to-human transmission.” “The strain…