Table 2.

Weighted seroprevalence stratified by time interval and resident or staff role

	All participants (n=9488)	Residents (n=3016)	Staff (n=6472)
June 1–July 31, 2020	30·6 (25·4–36·4)	37·9 (30·2–46·2)	29·8 (24·5–35·7)
Aug 1–Sept 30, 2020	26·4 (22·0–31·5)	32·9 (25·4–41·3)	24·0 (19·9–28·8)
Oct 1–Nov 30, 2020	26·5 (21·5–32·2)	33·0 (25·9–41·0)	25·3 (17·8–34·7)
Dec 1, 2020, to Jan 31, 2021	17·4 (13·6–22·0)	21·8 (15·0–30·6)	16·5 (12·8–20·9)
Feb 1–28, 2021	22·0 (17·2–27·6)	29·3 (21·8–38·0)	20·0 (15·1–25·8)
March 1–April 30, 2021	26·1 (21·9–30·7)	37·4 (30·5–44·9)	23·0 (19·1–27·5)

Data are % (95% CI). Data are weighted for LTCF-level testing rate in staff and residents.