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Table 2 Number of SARS-CoV-2 cases and cumulative incidence among staff and students by index case in nurseries reporting an outbreak to Public Health England (PHE) between 02 November 2020 and 31 January 2021

From: A cross-sectional national investigation of COVID-19 outbreaks in nurseries during rapid spread of the Alpha (B.1.1.7) variant of SARS-CoV-2 in England

 

When the Index Case is:

 

A child

Staff member with direct contact with children

Staff member swith no contact with children

All staff members

Number of outbreaks

45

117

8

125

Number of children

3971

9434

850

10,284

Cases in children

141

317

37

354

Cumulative incidence (95% confidence interval)

3.55% (3.01–4.19)

3.36% (3.01–3.75)

4.35% (3.12–6.01)

3.44% (3.10–3.82)

Number of staff with direct contact with children

848

1983

211

2194

Cases in staff with direct contact with children

214

744

48

792

Cumulative incidence (95% confidence interval)

25.24% (22.37–28.33)

37.52% (35.39–39.70)

22.75% (17.40–29.12)

36.10% (34.09–38.15)

Number of staff with no contact with children

111

399

48

447

Cases in staff with no contact with children

38

61

18

79

Cumulative incidence (95% confidence interval)

34.23% (25.66–43.92)

15.29% (11.98–19.28)

37.50% (24.32–52.67)

17.67% (14.31–21.60)

Total number of staff

959

2382

259

2641

Total cases staff

252

805

66

871

Cumulative incidence (95% confidence interval)

26.28% (23.54–29.21)

33.80% (31.90–35.74)

25.48% (20.38–31.32)

32.98% (31.19–34.82)

Total (staff and children)

4930

11,816

1109

12,925

Total cases

393

1122

103

1225

Cumulative incidence (95% confidence interval)

7.97% (7.24–8.77)

9.50% (8.98–10.04)

9.29% (7.68–11.19)

9.48% (8.98–10.00)