2019ncov
airborne
alarm
alert
analysis
bacteria
blood
blood test
concept
contagion
contagious
coronavirus
danger
dangerous
death
diagnosis
diagnostic
disease
epidemic
face mask
flue
global
health
health care
hospital
illness
incubation
infected
laboratory
lethal
mask
medical
medicine
negative
pandemic
pneumonia
positive
research
result
risk
sample
sars
sick
sickness
test
tube
virus