[\'Servicio de Microbiología Clínica, Hospital Universitario Príncipe de Asturias, Madrid, Spain.\', \'Servicio de Prevención de Riesgos Laborales y Salud Laboral, Hospital Universitario Príncipe de Asturias, Madrid, Spain.\']
Severe acute respiratory coronavirus virus 2 (SARS-CoV-2) infection among hospital workers in a severely affected institution in Madrid, Spain: A surveillance cross-sectional study.