airborne viruses
asymptomatic
bacteria
bond
call
career
carrier
carrier virus
cluster
copy space
corona
corona measures
coronavirus
covid19
disease
door knob
droplet infection
enlightenment
health
hospital
illustrations
incubation period
infection
infection prevention
infectious disease
inspection
malignant virus
margin
measures
medical
pneumonia
prevention
refrain from
route of infection
secondary infection
selfimposed request
source of infection
spread of infection
streptococcus pneumoniae
unconscious
unnecessary urgency
vector
virus
wash