Fig. 2. RSV patient encounters reflect changes in testing platforms.
a RSV patient encounters between January 4th, 2009 and February 20th, 2023 sorted by zip code across the 11 Emergency Medical Service (EMS) regions in Illinois (left; as defined by the Illinois Department of Public Health) and the 9 community regions in the city of Chicago (right; as defined by regional census data). The location of Illinois in the US is annotated in purple (top left). b 3-week rolling average of RSV tests administered (blue), detections (pink), and percent positivity (green) data from the Chicago Department of Public Health (CDPH) from September 29th, 2019 to January 22nd, 2023. The timeline of COVID-19 mitigation measures implemented in Chicago is represented in purple bars below. ∗The end of remote learning for Chicago Public Schools (CPS) was staged with K-8th grade return to in-person classes on March 1st, 2021, and 8th–12th grade return on April 19th, 2021. c Weekly rolling average of adult patient encounters in NM-affiliated institutions from January 4th, 2009 to February 20th, 2023. d Absolute counts (top) and proportion (middle) of NM-affiliated adult RSV patient encounters grouped by outpatients (blue) and inpatients (pink). Inpatients are further stratified by the proportion of those hospitalized without ICU admission (yellow), hospitalized with ICU admission (orange), and death (red) per RSV season (bottom). e Absolute counts (top) and proportion (bottom) of NM-affiliated adult patient encounters with a positive RSV test grouped by the diagnostic platform in each season (February to January).