Table 2. Model-selected terms from data streams (ordered by frequency from top to bottom) of the Multiple Source method at the county level.
The number of instances that a data stream was selected (values within parentheses) was reduced over time, given that some locations experienced fewer outbreak events than others. GT, Google Trends.
| Onset 2 (n = 97) | Onset 3 (n = 95) | Onset 4 (n = 91) | Onset 5 (n = 64) | Onset 6 (n = 17) | Onset 7 (n = 3) |
|---|---|---|---|---|---|
| (GT) covid (95) | (GT) covid symptoms (65) | (GT) covid symptoms (61) | (GT) covid symptoms (42) | (GT) covid (10) | (GT) Fever (3) |
| (GT) covid-19 (89) | (GT) covid-19 (54) | (GT) covid (60) | (GT) covid (34) | (GT) covid-19 (10) | (GT) covid symptoms (2) |
| (GT) covid symptoms (74) | (GT) covid (53) | Confirmed cases (45) | Confirmed cases (33) | (GT) covid symptoms (8) | Confirmed cases (2) |
| Confirmed cases (52) | Confirmed cases (34) | (GT) covid-19 (44) | (GT) covid-19 (29) | Confirmed cases (8) | (GT) covid-19 (2) |
| (GT) chest pain (50) | (GT) Ageusia (28) | (GT) Ageusia (29) | (GT) Ageusia (23) | (GT) Fever (7) | (GT) Phlegm (2) |
| (GT) quarantine (42) | (GT) chest pain (25) | (GT) chest pain (27) | (GT) Anosmia (20) | (GT) Ageusia (6) | (GT) Asthma (1) |
| (GT) how long does covid last (33) | (GT) fever (21) | (GT) Anosmia (23) | (GT) chest pain (14) | (GT) Anosmia (5) | (GT) covid (1) |
| (GT) covid-19 who (24) | (GT) Anosmia (19) | (GT) quarantine (18) | (GT) Fever (13) | (GT) Cough (4) | (GT) Abdominal pain (1) |
| (GT) chest tightness (20) | (GT) quarantine (17) | (GT) fever (14) | (GT) quarantine (11) | (GT) quarantine (4) | (GT) Bronchitis (1) |
| (GT) loss taste (15) | (GT) Acute bronchitis (16) | (GT) Acute bronchitis (14) | (GT) Chills (9) | (GT) fever (4) | (GT) quarantine (1) |