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Table 2 Number of samples with valid test results, number of samples positive for SARS-CoV-2, and weighed population prevalence with 95% confidence intervals at the national level and for the Stockholm region in Sweden in 2020

From: Point prevalence of SARS-CoV-2 infection in Sweden at six time points during 2020

Survey

Dates of survey

Sweden

Stockholm Region

Samples with valid test results

Positive samples

Weighted population prevalence (95% CI)

Samples with valid test results

Positive samples

Weighted population prevalence (95% CI)

(n = 13,490)

(n = 56)

 

(n = 4192)

(n = 45)

 

1

26 March–3 April

   

707

18

2.5% (1.4–4.1)

2

21–24 April

2571

23

0.9% (0.6–1.5)

679

12

2.3% (1.1–4.2)

3

25–28 May

2957

9

0.3% (0.1–0.5)

761

5

0.7% (0.2–1.6)

4

24–28 August

2518

0

0.0% (0.0–0.2)

623

0

0.0% (0.0–0.6)

5

21–25 September

2461

0

0.0% (0.0–0.2)

632

0

0.0% (0.0–0.6)

6

30 November–4 December

2983

24

0.7% (0.4–1.2)

790

10

1.0% (0.4–2.1)