text: A RNA virus is usually the one which has either single or double stranded strands of RNA & are usually the viruses which affect & cause majority of the infections in the world by affecting either animals, plants & humans. HIV is one such example. DNA viruses on the other hand may have a single or double stranded DNA & usually are less infectious than the RNA viruses. However, both can cause life threatening diseases. \nIn either cases a virion which is the dormant/nonliving,passive form of the virus which is nothing but RNA/DNA wrapped in a protein coat & carrier of it on finding a suitable host will infect it by attaching to a specific receptor on the host cell. \nAfter infection, only the RNA/DNA of the virus enters the host cell & replicate via various mechanisms using the hosts machinery & energy for repliction, sometimes involving a suitable intermediate. When sufficient copies of the RNA/DNA have been made, the virus lyses the host cell & finds other host cells killing the previous host cell. Sometimes the virus may even get replicated with the host cell itself by incorporating ita DNA with the hosts DNA & this is called lysogeny. \neg of DNA viruses.-- Herpes Simplex virus\n"  " RNA Viruse-- HIV virus.