Table 2 Overall proportion of HCW with (a) detectable antibodies, (b) history of past positive rRT-PCR, (c) Positive rRT-PCR at study recruitment, and (d) Cumulative prevalence of infection (past/current rRT-PCR and/or antibodies).

From: Seroprevalence of antibodies against SARS-CoV-2 among health care workers in a large Spanish reference hospital

 

n

Total

% (95% CI)

Not previously diagnosed as COVID-19 by rRT-PCR (n (%))

COVID19-symptoms reporteda n (%)

Seropositive to SARS CoV-2 Antibodies (IgA and/or IgM and/or IgG)

54

578

9.3% (7.1–12.0)

21 (38.9%)

10 (47.6%)

Positive rRT-PCR at study recruitmentb

15

576

2.6% (1.5–4.3)

6 (42.9%)

3 (50.0%)

Any evidence of past/current infection by rRT-PCR of serology

65

578

11.2% (8.8–14.1)

26 (40.0%)

12 (46.2%)

  1. aAmong those not previously diagnosed as COVID-19 (from previous column).
  2. bResults of 42 of the 578 rRT-PCRs done were invalid (Ct ≥ 40 for RNase P).
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