A virus is an infectious submicroscopic creature that only reproduces inside live cells. All living things, including plants, animals, and microbes like bacteria and archaea, are susceptible to virus infection.
Viruses are not living, hence they cannot die since, in order for something to die, it must be alive.
Despite possessing genetic material in the form of nucleic acid (DNA) or a closely related molecule (RNA), viruses are unable to survive on their own.
They break in to take control of the host. In this manner, they survive and flourish throughout in many hosts.
A single- or double-stranded nucleic acid (DNA or RNA) is encased in a protein shell called a capsid, and some viruses also have an outer envelope made of lipids and proteins.
Viruses are significantly smaller than bacteria. Their shapes differ. RNA viruses and DNA viruses are the two primary groups.