We submitted a paper to a prominent Pediatrics journal that found, "... our analyses suggest that a fixed window would need to be extended to be both a month earlier and a month later (September–April) to more definitively capture the entire RSV season." It was rejected 6 weeks ago (and is under review at a different journal) because the reviewers felt like an additional season of data was required to be sure. Here is the additional season from @AAPNews. publications.aap.org/aapnews/news/3…