Genetic testing and serological screening for SARS-CoV-2 infection in a COVID-19 outbreak in a nursing facility in Japan

Table 3 Facility-wide rapid antibody kit testing performed in the facility

	Positive results of IgG for SARS-CoV-2
	Facility-wide testing
	April 23-27^a	June 12-15^b	Total
Unit 1
Residents (n = 13)	2/13^c	1/10^c	3/23
Nursing staff members (n = 4)	0/4	0/4	0/8
Unit 2
Residents (n = 34)	1/34^c	2/32^c	3/66
Nursing staff members (n = 14)	0/14	0/14	0/28
Unit 3
Residents (n = 29)	0/29	0/28	0/57
Nursing staff members (n = 12)	0/12	0/12	0/24
Other staff members (n = 10)	0/10	0/8	0/18
Total	3/116	3/108	6/224

^aThe testing was performed for PCR-negative residents and staff who were present in the facility as of April 22, 2020.
^b The testing was performed for PCR-negative residents and staff who were present in the facility as of June 11, 2020.
^c These include repeated IgG-positive results in the same resident.
SARS-CoV-2, severe acute respiratory syndrome coronavirus 2

ISSN: 1471-2334