Table 2. Acceptance of Continuous Respiratory Surveillance.

Group	Module 1a		Module 2b		Module 3c
	Successful, No. of participants/total No.d	Rate (95% CI), %	Successful, No. of participants/total No.d	Rate (95% CI), %	Successful, No. of participants/total No.d	Rate (95% CI), %
Children	33/99	33.3 (24.8-43.1)	33/104	31.7 (23.3-41.2)	117/179	65.4 (58.1-71.9)
Child care workers	18/18	100.0 (82.4-100.0)	11/24	45.8 (27.9-64.9)	33/42	78.6 (64.1-88.3)
Overall	51/117	43.6 (35.0-52.6)	44/128	34.4 (26.7-43.0)	150/221	67.9 (61.5-73.7)

^a Module 1 included SARS-CoV-2 surveillance by biweekly nasal midturbinate swabs over the regular study period of 12 weeks.

^b Module 2 included SARS-CoV-2 surveillance by weekly nasal midturbinate swabs over the regular study period of 12 weeks.

^c Module 3 included SARS-CoV-2 surveillance by weekly saliva sampling over the regular study period of 12 weeks.

^d A participant in the respiratory surveillance was classified as successful if 60% of all planned samples were available from the participant. One child and 4 childcare workers who were initially considered eligible and had given informed consent to respiratory sampling were excluded from primary end point analysis, because they could not participate in respiratory sampling for reasons unrelated to the respiratory surveillance measures (eg, seropositivity for SARS-CoV-2 at the beginning of the study, maternity leave, and change of day care center).