Association Between ILI and CV Events
cough, sore throat, fever
SORE THROAT, INFLUENZA-LIKE ILLNESS, INFLUENZA
Influenza-like illness was defined based on the percentage of visits to sentinel clinicians for fever (temperature ≥37.8 °C) and a cough and/or a sore throat without a known cause other than influenza as reported to the CDC US Outpatient Influenza-Like Illness Surveillance Network. Therefore, ILI could have included any respiratory pathogen presenting with these symptoms. We included CDC data from 108 US sites and territories; sites from Florida and Canada were not included due to unavailable weekly ILI data. Race categories included Asian, Black, First Nations or American Indian, White, and other (Native Hawaiian, Pacific Islander, >1 race, chooses not to report, does not know, and not available or missing), and ethnicity categories included Hispanic or Latino, non-Hispanic or non-Latino, and other (chooses not to report, does not know, and not available or missing). Race and ethnicity were ascertained by self-report.