Face shield
Coronavirus disease 2019 (COVID-19)
Medicine
Randomized controlled trial
Pandemic
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)
2019-20 coronavirus outbreak
Transmission (telecommunications)
Face masks
Personal protective equipment
Clinical trial
Health care
Surgery
Virology
Pathology
Economic growth
Disease
Infectious disease (medical specialty)
Economics
Engineering
Outbreak
Electrical engineering
