3d
attention
bacteria
border
caution
coronavirus
covid
covid19
danger
dangerous
epidemic
europe
european
flag
forbidden
healthy
hiv
human
infection
influenza
information
italian
italy
mers
model
molecule
ncov
novel
outbreak
pandemic
panic
prohibit
prohibition
protect
protection
quarantine
restrict
restricted
restriction
risk
sars
sign
stop
symbol
tourism
transportation
travel
virus
warning