Fig. 2.

SARS-CoV-2 seropositivity according to four occupational factors, with 95% Wilson confidence intervals: (A) number of protective measures used (among face mask, gown, gloves, goggles) while caring for COVID-19 patients; (B) number of correctly identified elements of standard precautions (among hand hygiene, cough etiquette, surgical mask in case of respiratory symptoms, vaccinations, donning of gowns if potential contact with body fluids); (C) number of contacts with COVID-19-positive co-workers; (D) frequency of meals in the hospital canteen.