To trial or not to trial: Veteran vaccine advisers say vaccine clinical trials alone don't tell whole storyTwo nationally recognized scientists with decades of experience advising U.S. vaccine policy argue that it is a mistake to exclude well-designed observational studies in determining how well vaccines work on a year-to-year basis.Mon, 20 Jul 2026 00:12:44 -0800Infectious DiseaseEpidemiologyEpidemiologyVaccinesArnold MontoIllustration of a vaccine or shot.