asthma
atmospheric pollution
bacteria
beware of germs getting
boy
bronchitis
care
children
cold
cough
disinfect
elementary school
environmental issues
environmental pollution
fatigue
fever
flu
germs
hay
headache
healthy
heat
hospital
hygiene
hyperthermia
illness
illustration
infection
juvenile
mask
medical care
nursery
other bacteria
phlegm
pneumonia
pollution
prevention
public health laboratory
runny nose
school
smog
sneezing
toddler
virus
winter
wog