Table 4.

Seroprevalence of SARS-CoV-2 by history of respiratory symptoms and immunization records.

Characteristics	Population Size	Number of Positive	Seroprevalence, % (95% CI)
History of respiratory symptoms in previous three months
yes	1896	1697	89.5 (88–91)
No	1719	1478	86.0 (84–88)
History of COVID-19 diagnosis
yes	74	65	87.8 (79–94)
no	3116	2707	86.9 (86–88)
do not know	425	378	89.0 (86–92)
Immunization records
yes	251	234	93.2 (90–96)
no	3364	2916	86.7 (86–88)