aids
analyzing
antihiv
biology
blood
chemical
chemistry
disease
epidemic
fever
hbv
hcv
hematology
hepatitis b
hepatitis c
hiv
hospital
illness
immunology
infection
lab
laboratory
medical
medical exam
medical test
medicine
micro organism
microbiology
patient
research
science
scientific experiment
serology
sex
sexually transmitted diseases
sick
sickness
syphilis
test
treponema pallidum
virus