The ascension of Robert F. Kennedy Jr., a longtime anti-vaccine activist, to the nation’s top health post has alarmed medical ...

People have been hearing a lot about H5N1 bird flu -- or highly pathogenic avian influenza -- since a B.C. teen became the ...

H5N1 avian influenza, more commonly known as bird flu, has infected more than 100 million birds in the U.S. and almost 500 ...