Setting and participants
cough, respiratory illness, ARI
INFLUENZA
This study was conducted initially at nine homeless shelters in King County, WA. Participants were enrolled over a cumulative 12 months, composed of two 6‐month influenza seasons, from 11/15/19 to 4/30/20 in Year 1 and from 11/2/20 to 4/30/21 in Year 2.Study eligibility criteria included being a resident at a participating shelter; age ≥ 3 months old; and experiencing new or worsening cough alone or two or more acute respiratory illness (ARI) symptoms in the last 7 days. During the intervention period, criteria included willingness to perform a rapid influenza molecular test and take study medication if the result was positive.