alert
awareness
background
bacteria
cancer
cell
circle
cold
concept
contagious
contaminated
crisis
crowd
danger
disease
ebola
epidemic
fever
flu
germ
germs
health
healthcare
hiv
illness
illustration
infection
influenza
medical
medicine
microbes
microorganism
opioid
pandemic
patient
prevention
protects
red
risk
safety
sickness
spread
symptom
transfer
transmission
viral
virus
white
word