asia
biohazard
cough
dangerous
deadly
disease
diseased
dust
environment
epidemic
fever
flu
hazard
health
hospital
ill
illness
illustration
infection
infectious
influenza
mask
mers
outbreak
pneumonia
protect
protective
quarantine
respiratory
safety
sars
sick
sick person
sickness
sneeze
stop
unhealthy
viral
virus
warning
wear
wearing
worried