Table 3.
Summary of Self-reported Symptoms for the COVID-19 (COVID), Non-COVID-19 Flu (NCF), and Pre-COVID-19 Flu (PCF) Cohorts
| Symptom Prevalence |
Peak Symptom Day Relative to Illness Onset |
|||||
|---|---|---|---|---|---|---|
| COVID (n = 230), % | NCF (n = 426), % | PCF (n = 6,270), % | COVID | NCF | PCF | |
| Cough | 84.3 | 71.6 | 85.1 | 5 | 3 | 3 |
| Headache | 71.3 | 68.1 | 74.3 | 4 | 3 | 3 |
| Body muscle ache | 66.1 | 67.1 | 80.8 | 4 | 2 | 2 |
| Shortness of breath | 65.7 | 24.2 | N/A | 6 | 8 | N/A |
| Fatigue | 61.7 | 54.7 | 70.9 | 5 | 3 | 3 |
| Fever | 61.3 | 62.0 | 74.6 | 5 | 2 | 2 |
| Chills or shivering | 53.5 | 55.4 | 69.3 | 4 | 3 | 2 |
| Sore throat | 51.7 | 48.8 | 61.1 | 3 | 2 | 3 |
| Nasal congestion | 49.6 | 49.3 | 65.4 | 5 | 2 | 3 |
| Chest pain/pressure | 49.6 | 19.7 | N/A | 6 | 2 | N/A |
| Sweats | 42.2 | 47.4 | 56.3 | 5 | 2 | 2 |
| Anosmia | 38.3 | 15.5 | N/A | 7 | 3 | N/A |
| Sneezing | 37.0 | 36.9 | 48.2 | 4 | 2 | 3 |
Symptom prevalence refers to the percentage of the cohort reporting the symptom at any time during the ILI event and symptoms are sorted by most (top) to least (bottom) prevalence in the COVID-19 cohort. The day of peak symptom occurrence relative to illness onset corresponds to the maximum of a centered 5-day rolling mean of day-by-day symptom prevalence for each cohort. Some symptoms (i.e., shortness of breath, chest pain/pressure, and anosmia) were only included in the updated survey and therefore are not available for the pre-COVID-19 flu cohort. N/A, not applicable.