Table 3.
A comparison of published seroprevalence studies with our estimated true cumulative infection rates: the study, the country where the samples were collected, the region where the samples were collected, the dates when the samples were collected, the reported rate of seroprevalence (best estimate and 95% confidence interval), and the estimated true cumulative infection rate according to this study (median and 95% confidence interval).
| study | country | location | dates | seroprevalence (%) | this study (%) |
|---|---|---|---|---|---|
| Havers et al. [6] | USA | Western Washington State | 23 March–1 April 2020 | 1.1 (0.7–1.9) | 1.40 (0.86–2.36) |
| New York City metro area | 23 March–1 April 2020 | 6.9 (5.0–8.9) | 1.40 (0.86–2.36) | ||
| Louisiana | 1–8 April 2020 | 5.8 (3.9–8.2) | 2.07 (1.41–3.66) | ||
| South Florida | 6–10 April 2020 | 1.9 (1.0–3.2) | 2.35 (1.61–4.14) | ||
| Philadelphia metro area | 13–25 April 2020 | 3.2 (1.7–5.2) | 3.09 (2.15–5.44) | ||
| Missouri | 20–26 April 2020 | 2.7 (1.7–3.9) | 3.34 (2.32–5.88) | ||
| Utah | 20 April–3 May 2020 | 2.2 (1.2–3.4) | 3.52 (2.45–6.19) | ||
| San Francisco Bay area | 23–27 April 2020 | 1.0 (0.3–2.4) | 3.45 (2.40–6.07) | ||
| Connecticut | 26 April–3 May 2020 | 4.9 (3.6–6.5) | 3.68 (2.56–6.47) | ||
| Minneapolis–St Paul–St Cloud metro area | 30 April–12 May 2020 | 2.4 (1.0–4.5) | 3.97 (2.76–6.97) | ||
| Bendavid et al. [2] | USA | Santa Clara County, California | 3–4 April 2020 | 2.8 (1.3–4.7)a | 1.99 (1.35–3.52) |
| Pollán et al. [30] | Spain | nationwide | 27 April–11 May 2020 | 6.2 (5.8–6.6)b | 7.68 (5.35–13.48) |
| Hicks et al. [7] | Australia | nationwide | May–June 2020 | 0.28 (0.00–0.71) | 0.06 (0.04–0.10)c |
aWeighted by the authors for the population demographics of Santa Clara County.
bEither point-of-care test or immunoassay positive.
cStatistics are calculated for the period 1 May–30 June 2020.