Only half of babies who get late-onset GBS have mothers who are group B strep carriers, and nobody knows how the others get infected with the bacteria, so prevention is difficult.

Carriers are people who are asymptomatic but test positive for strep bacteria on a throat culture. If someone you are in close contact is a carrier, they may be reinfecting you with the bacteria.

Researchers have discovered how antibodies help to protect against contagious bacterial infections caused by Strep A, including strep throat. And the findings are already contributing to efforts ...