That there is no RSV vaccine for kids is not for lack of interest, experts say.
But a trial gone wrong many years ago and a tricky target protein have made developing an RSV vaccine difficult.
Researchers’ attempts to develop an RSV vaccine go back decades, according to Dr. Ofer Levy, the director of the Precision Vaccines Program at Boston Children's Hospital.
In August, Pfizer announced that its experimental RSV vaccine was nearly 86% effective in preventing severe illness in adults ages 60 and older.
GSK, however, said it abandoned its efforts last year to develop a pediatric RSV vaccine, because trials suggested it wasn't effective.