After more than five decades of trying, the drug industry is on the verge of providing effective immunizations against the respiratory syncytial virus, which has put an estimated 90,000 U.S. infants and small children in the hospital since the start of October.
But only one of the shots is designed to be given to babies, and a glitch in congressional language may make it difficult to allow children from low-income families to get it as readily as the well-insured.
