Medicine: Flu Again

Among the unnumbered Americans who suffered last week from sniffles and fevers caused by a variety of viruses, tens of thousands had influenza. The outbreaks skipped across the map from Florida to Missouri and Illinois, over the Continental Divide to the southwestern mountain states, and up the Pacific Coast to remote island villages in Alaska.

So far. all the flu viruses isolated from selected patients and identified by complicated laboratory techniques have proved to be type B. instead of the Asian mutant of the type A group that caused the last notable epidemic two...