In addition to cross-sectional surveys, participants were surveyed on a daily (before August 2021) or weekly (after August 2021) basis regarding symptoms including the following: scratchy throat, painful sore throat, cough, runny nose, fever or chills, temperature >100.4°F or 38.0°C, muscle aches, nausea, vomiting, diarrhea, shortness of breath, unable to taste or smell, and red or painful eyes. We did not use these surveys to classify people as having Long COVID. We categorized the surveys for each individual by time period relative to date of SARS-CoV-2 positive test into 30–60 days preinfection, 0–30 days preinfection, 0–30 days postinfection, 30–90 days postinfection, 90–180 days postinfection, 180–365 days postinfection, and >365 days postinfection. For each period, we summed the proportion of respondents averaging ≥1 symptom and the average number of symptoms reported by Long COVID status among respondents to the cross-sectional survey and among nonrespondents infected with SARS-CoV-2, and individuals without infection (averaged over all time points since March 2020).