herpesvirus, herpes simplex virus, herpesviruses, retrovirus, herpes simplex, varicella zoster virus, virus, human immunodeficiency virus, parainfluenza virus, whipworm, herpes, bacterium, helminths, pneumocystis, parasite, pathogen, disease, mutation, papillomavirus, genetic mutation, malaria parasite, pneumococcus, mycobacterium tuberculosis, flavivirus, genus plasmodium, adenovirus, trypanosoma, borrelia burgdorferi, mosaicism, protozoan, immunodeficiency, gene mutation, infection, staphylococci, proteinase, mycobacterium, pinworms, sarcoid, spirochetes, mutant gene, htlv, antibodies, pestis, cowpox, lectin, falciparum, schistosoma, rhinoviruses, francisella, ebola virus, serotype, chlamydia trachomatis, poxvirus, streptococcal, toxoplasmosis, meningococcus, herpes zoster virus, cytomegalovirus, infectivity, vaccinia, borrelia, lassa virus, bacteroides, chlamydial, parasitic worm, reoviruses, rhinotracheitis, coccidia, genital herpes, plasmodium, lymphocytic choriomeningitis, arenavirus, toxoplasma, lentiviruses, trypanosome, fungus, tapeworm infection, bacterial, meningoencephalitis, genetic abnormality, tubercle bacillus, variola, mycoplasma, alphavirus, achromatopsia, poliovirus, enterotoxin, noninfectious, neisseria, trypanosomes, roundworms, lentivirus, mycobacteria, bacterial toxin, hookworms, urease, antigen, cutaneous anthrax, pathogenic, infectious mononucleosis, germ, francisella tularensis

epstein-barr virus, herpes zoster

animal virus