Outcomes and statistical analyses
INFLUENZA
All data in this analysis are presented by participant encounter, defined as each time an eligible individual provided a nasal swab and completed a survey with study staff. We used descriptive statistics to evaluate the sociodemographic and clinical characteristics at baseline in control and intervention periods for study Years 1 and 2; these characteristics were also described by lab‐confirmed influenza result. Descriptive and statistical analyses were performed using R Statistical Software (Version 4.0.3, Foundation for Statistical Computing, Vienna, Austria).