Like that baby, the vast majority of the nearly half-million infants born prematurely in the United States are given antibiotics, even without evidence of infection. Many preemies are kept on the drugs after blood tests say they are not sick. Yet that practice, once considered the best way to protect a hospital’s most vulnerable patients, is now being challenged. “We’re beginning to recognize that the risk of giving that antibiotic may actually outweigh the benefit,” says Josef Neu, a neonatologist at the University of Florida in Gainesville. Read more.