The development of a new experimental patch could protect travelers from developing diarrhea, known as Montezuma’s Revenge.

A travelers' diarrhea vaccine patch -- applied by a person without a doctor -- yields a robust immune response, a U.S. drug company said.

By Michael S Rosenwald, Washington Post Staff Writer Executives at Iomai Corp.

Dreaded vaccinations one day could be as simple as sticking on a Band-Aid - ouchless and do-it-yourself.

By Joe Bacchus As more companies enter the growin