2019ncov
alert
attention
background
bacteria
biohazard
care
caution
concept
contagious
contamination
corona
coronavirus
danger
disease
epidemic
fever
flu
global
health
human
illness
infected
infection
influenza
mask
medical
medicine
mers
outbreak
pandemic
pneumonia
prevention
protection
quarantine
respiratory
risk
safety
sars
science
syndrome
vaccine
viral
virus
warning
world