Coronavirus disease 2019 (COVID-19)
Face masks
Respirator
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)
2019-20 coronavirus outbreak
Pandemic
Coronavirus
Face (sociological concept)
Medicine
Systematic review
MEDLINE
Medical emergency
Disease
Infectious disease (medical specialty)
Virology
Pathology
Outbreak
Political science
Sociology
Social science
Materials science
Law
Composite material
