How We Can Classify The Viruses Explain Some Viral Diseases?

Classification of virus: Virus morphology and nucleic acid properties are most important for classifying plant, animal and bacterial viruses. The genetic materials may be DNA or RNA naked, enveloped or complex. On the basis of morphology viruses are classified into road shaped (T.M.V), spherical and tadpole like bacteria-phage viruses etc.

Some viral diseases: There are many diseases which are caused by viruses. Only those are being mentioned here which are common in Pakistan.
Small pox: Smallpox, which is caused by pox viruses (the DNA enveloped virus) is an ancient disease that is known to have occurred as epidemic in China as early as the twelfth century B.C. Until the early twentieth century, small pox was a common disease throughout the world. In small pox, raised fluid-filled vesicles are formed on the body which become pustules later on and from pitted scares, the packs. In 1950's immunization and other control measures had largely decreased the danger, but it is still present in the third world countries where many people are affected.

1. Herpes simplex: Herpes virus (DNA virus) is responsible for this disease.
2. Influenza: Influenza viruses are enveloped RNA viruses.
3. Mumps and Measles: Mumps and Measles viruses belong to group premix viruses.
4. Polio: poliomyelitis, caused by polio virus, is found all over the world.