3d
bacteria
bacterium
biology
bun
burger
contagious
coronavirus
covid
covid19
dangerous
diseased
epidemic
flu strains
food
germ
global calamity
hamburger
hiv
horizontal
human
illness
immune
incubate
infection
infirm
influenza
medicine
mers
model
molecule
ncov
novel
outbreak
pandemic
panic
pneumonia
prevention
protection
quarantine
rapidly
respiratory
robust
sars
spread
symbol
transmit
virus