The number of influenza cases is surging across the United States, putting significant strain on many hospitals. We asked the ...

Periodically, the yearly flu transforms into a particularly virulent strain, like the Spanish flu that killed millions of people in 1918. How do these pandemic strains arise? Aa Aa Aa Although ...

This season's influenza vaccine may have been a poor match to a strain of the flu virus that caused many infections this winter, early data released by the Centers for Disease Control and ...