Merck & Co., Inc. announced today that the Company

NEW YORK Chancroid vaccine A vaccine against the bug that causes the sexually transmitted disease known as chancroid has shown promise in experiments conducted in pigs, scientists report.

A vaccine against the bug that causes the sexually transmitted disease known as chancroid has shown promise in experiments conducted in pigs, scientists report.

Millions of bacteria live within the recesses of our noses and upper respiratory tracts, waiting for a chance to infiltrate and infect. But long before these bacteria break through our immune defenses, they must first compete against other bacterial species to colonize the mucus-lined surfaces of our noses.