Classification of Human Viral Diseases Based on the Tissue Affected
| Group | Tissues Affected | Important Diseases |
| Pneumotropic | Respiratory system | Influenza,Respiratory Syncytial Disease,Adenovirus Infection,Rhinovirus Infection |
| Dermotropic | Skin and Subcutaneous Tissues | Chicken Pox,Herpes Simplex, Measles,Mumps,Small Pox,Molluscum Contagiosum,German Measles |
| Viscerotropic | Blood and Visceral Organs | Yellow Fever,Dengue Fever,Infectious Mononucleosis,Cytomegalovirus Disease,Infectious Hepatitis,Serum Hepatitis,Sandfly Fever,Colorado Tick Fever |
| Neurotropic | Central nervous systen | Rabies,Polio, Encephalitis,Slow Virus Disease |