Figure 2.

Adjusted SARS-CoV-2 IgG antibody seroprevalence by serosurvey collection period, Ontario, Canada, March–June 2020 (n = 8,902)

COVID-19: coronavirus disease. SARS-CoV-2: severe acute respiratory syndrome coronavirus 2.

The three serosurveys were performed between the following dates: 27 March–30 April 2020 (March–April survey), 26–31 May 2020 (May survey) and 5–30 June 2020 (June survey). Seroprevalence estimates were adjusted for population weighting and serology test characteristics. The solid bars indicate adjusted seroprevalence and the error bars indicate 95% confidence intervals.