Toby Gould was an early adopter. In September, Mr. Gould, 78, went to a pharmacy in Hyannis, Mass., to get one of the new vaccines for respiratory syncytial virus, known as R.S.V. He has asthma, which would heighten his risk of serious illness if he were to be infected.Carol Kerton, 64, knew R.S.V. could be…
