bacillus
chemistry
clinical
covid19
diagnosis
disease
drug
examination
examine
experiment
health
hospital
icon
illustration
infection
influenza
injection
judgment
laboratory equipment
medical
medical treatment
medicine
negative
new coronavirus
pathogen
pathogenic bacteria
pcr test
positive
positive reaction
reagent
research
research and development
researcher
science
set
sign
simple
specimen
syringe
test equipment
test method
three colors
treatment
vaccination
vaccine
virus
virus test