Nobody ...
I disagree. In February, March and April of 2003 I was providing daycare for my newborn, premature granddaughter. Preemies are very susceptible to RSV, especially in winter, but there was an RSV vaccine available. I would take her for a booster shot every two weeks, which was all the longer the vaccine was effective. I was grateful for anything that kept her healthy and growing then, and I still am. She turned 20 in January.