A rapidly-spreading H5N1 avian influenza, otherwise known as bird flu, has been devastating bird flocks and showing signs of spreading to other mammals.
The U.S. Centers for Disease Control and Prevention (CDC) confirmed another human H5N1 avian flu case -- otherwise known as bird flu -- in California on Thursday, bringing the nationwide total of cases to 67.
It’s long been a mystery why folks need a flu vaccine every year, even though immunizations they got in childhood continue to protect them from measles and mumps.
