The FDA tested the injectable vaccine for effectiveness and safety on more than 7,500 infants and toddlers in the US and Mexico.
Bacterial meningitis and HIB disease can cause sepsis by infecting a child's bloodstream or, in the case of meningitis, by infecting the lining around the brain and spinal cord.
Diseases caused by the bacteria progress rapidly and can cause death or long-term problems such as blindness or brain damage.
