abstract
analysing
background
biology
black
body
cells
cold
contagion
contagious
death
disease
fearsome
flu
gloved
green
health
hold
holding
human
hypodermic
ill
illness
infection
injecting
inside
inspecting
latex
life
medical
microbiology
microscopic
molecules
organic
organism
professional
protection
protein spikes
scary
science
scientific
scientist
sick
spikes
spreading
syringe
testing
viewing
virus