Medicine
Respiratory tract infections
Incidence (geometry)
Disease burden
Pandemic
Context (archaeology)
Population
Lower respiratory tract infection
Mortality rate
Burden of disease
Rate ratio
Attributable risk
Pediatrics
Disease
Intensive care medicine
Environmental health
Internal medicine
Coronavirus disease 2019 (COVID-19)
Infectious disease (medical specialty)
Respiratory system
Paleontology
Physics
Optics
Biology
