Fig. 3

RSV testing frequency and positivity in MarketScan (2011–2019) by age group and clinical setting. In MarketScan RSV tests were identified using the “strict” definition, which required an RSV-specific test procedure code or an unspecific procedure code that was accompanied by a diagnosis indicative of respiratory illness (see Additional file 1: Table S1). Positivity was measured as the proportion of RSV tests accompanied by diagnoses codes on laboratory claims or adjacent medical encounters. Positivity for tests in NREVSS was directly extracted from recorded test results. RSV: respiratory syncytial virus; MarketScan: MarketScan Commercial Claims and Medicare Supplemental Databases; #: Number, ED: emergency department