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Disposition of participants 18–49 years old in the (A) sentinel and (B) expanded cohorts. Expanded cohort groups included in this report are highlighted in yellow. Participants who did not receive SIIV concomitantly with the RSV vaccine received it 1 month later. Abbreviations: Cmplt’d, completed; f/u, follow-up; PV1, postvaccination 1; rec’d, received; RSV, respiratory syncytial virus; RSVpreF, bivalent RSV prefusion F vaccine; SIIV, seasonal inactivated influenza vaccine.
