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Table 3 VZV serological test results and history of varicella among 1804 HCWs

From: Nosocomial transmission of chickenpox and varicella zoster virus seroprevalence rate amongst healthcare workers in a teaching hospital in China

History of Varicella VZV antibody results
Total (no.) Positive no.(%) Negative no.(%) PPV NPV
Positive 214 173 (80.8) 41 (19.2) 80.8 10.6
Negativea 1590 1422 (89.4) 168 (10.6)   
  1. aincluding uncertain history