adhesion
ban
caution
cleanliness
close contact
cluster
conversation
covid19
crowd
design
doorknob
enclosed space
eradication
flat
graphic
hand
handrail
handshake
hanging strap
hygiene
icon
illustration
infection
infection risk
infectious disease
infectious disease prevention
loud
mark
mass infection
measures
medical care
multiple
near
new coronavirus
pathogen
precautionary statement
prevention
screen
set
simple
smartphone
strap
switch
toilet
touch
unspecified majority
ventilation
virus
washing
watch out