Infectious Diseases: No RSV, Please

INFECTIOUS DISEASES No RSV, Please Each year, 10,000 U.S. infants die of lower-respiratory infections — more than half of them caused by a microbe with the forbidding name of "respiratory syncytial virus." Researchers have now devised a new vaccine against RSV.

Unhappily, it turns out to be a partial failure, according to evidence presented at a recent Manhattan virology conference. In fact, RSV has once again confronted virologists with the paradox that a vaccine sometimes worsens the dis ease it theoretically prevents.

Most adults carry telltale antibody showing that they have been infected...

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