Name a human disease caused by an infectious pathogen which:
a) contains only DNA but not RNA.
One of:
Herpes simplex, genital herpes, chicken pox, shingles (zoster), smallpox,
papilloma, cervical cancer, glandular fever, Burkitt lymphoma,
nasopharyngeal carcinoma, hepatitis B, upper respiratory infections,
pneumonia, viral meningitis, etc

b) contains only RNA but not DNA.
One of:
influenza, ebola, measles, mumps, rabies, rubella, poliomyelitis, hepatitis C,
yellow fever, common cold, etc

c) contains neither DNA or RNA.
CreutzfeldtJakob
Disease (CJD), Variant CreutzfeldtJakob
Disease (vCJD),kuru