abstract
attention
bacteria
biohazard
biology
careful
caution
concept
contagious
contamination
coronavirus
danger
dangerous
diagnosis
disease
earth
epidemic
flu
global
hazard
health
illness
infected
infection
infectious
information
medical
medicine
microbe
microbiology
pandemic
protection
red
research
respiratory
risk
science
scientific
serious
stop
syndrome
vaccine
virus
warning
white
world