Table 1. Characteristics of study participants.

Results are presented as N (%) or medians [interquartile ranges].

	Total (N = 335)
Age—yr	35 [25–49]
Females—no. (%)	170 (51)
Contact with a confirmed case—no. (%)	153 (46)
Time since last contact—days	5 [0–7]
Presence of symptoms on the day of testing—no. (%)	143 (43)
Time from symptom onset—days	2 [1–3]
Cough—no. (%)	59 (41)
Headache—no. (%)	63 (44)
Rhinorrhea—no. (%)	53 (37)
Asthenia—no. (%)	58 (41)
Muscle pain—no. (%)	46 (32)
Fever—no. (%)	38 (27)
Diarrhea—no. (%)	107 (8)
Chills—no. (%)	7 (5)
Anosmia—no. (%)	10 (7)
Shortness of breath—no. (%)	7 (5)
Chest pain—no. (%)	7 (5)
Smoking in the last 24 hours—no. (%)	69 (21)
Consumption of alcohol in the last 24 hours—no. (%)	71 (21)
Consumption of coffee in the last hour—no. (%)	53 (16)
Tooth brushing in the last 2 hours—no. (%)	122 (36)
Mouth washing in the last 2 hours—no. (%)	6 (2)