20s
ache
afflicted
ailing
antiviral
black
blanket
blood
bloodstream
catarrh
cells
close up
cold
disease
diseased
female
fever
flowing
flu
headache
health
heat
home
hosts
ill
illness
immune
immunity
infection
infectious
influenza
medicine
microbiology
molecules
organism
pain
platelets
shiver
sick
sickness
spreading
suffering
system
temperature
tissue
treatment
unhealthy
unwell
vaccinations
vaccines
virus
woman
young adult