alveolar
breath
chest
corona
coronavirus
cough
cov
dangerous
disease
doctor
failure
fatigue
fever
flu
health
human
illness
illustration
infection
influenza
infographic
internal
lung
man
medicine
mers
merscov
middle
organ
outbreak
people
pneumonia
prevention
renal
respiratory
risk
sars
sickness
stop
symptom
symptoms
syndrome
transmit
vaccine
viral
virus
warning
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