Human biomonitoring without in-person interaction: public health engagements during the COVID-19 pandemic and future implications

Table 1 Rates of participant enrollment and sample collection over two project phases

Project Phase	Mailing Batch	Mailing Distributed	Enrollment Rate	Sample Submission Rate
Phase I (Batches 1–9)	1	33	3	3
	2	33	1	1
	3	33	8	6
	4	44	7	7
	5	44	3	3
	6	55	9	9
	7	99	12	8
	8	165	25	23
	9	176	26	21
Phase II (Batches 10–20)	10	275	46	41
	11	275	54	51
	12	275	37	32
	13	275	39	33
	14	275	33	30
	15	275	41	32
	16	275	28	24
	17	275	41	25
	18	265	33	28
	19	270	31	25
	20	270	34	23
	Total	3,687	511	425

ISSN: 1471-2288