A very simple answer is lysogenic virus. it could still kill the cell eventually if it becomes lytic.
No, it needs a host call because it doesn't have the ability to reproduce on its own. It does not have all of the characteristics of a cell.
It is a protein on the influenza virus that is thought to help the virus escape from the cell after it replicates. Zanamivir and oseltamivir are drugs that inhibit this action and thus trap virus particles within an infected cell.
Heredity does occur in viruses. When a virus replicates it carried it to the offspring.
Human Immunodeficiency Virus (HIV) is a retrovirus. A retrovirus is a RNA virus that replicates through a DNA intermediate. HIV synthesises DNA from RNA by the action of reverse transcriptase enzyme.
I am assuming that you are asking how a virus lives in the body. A virus is NOT a live organism. It is able to penetrate the host's cells and duplicate the RNA/DNA within those cells and when those cells replicate, the virus also replicates, thus growing in numbers very quickly. Viruses are difficult to kill since they are not considered living organisms. One way that might help is to denature the proteins that are living inside the cytoplasm of the virus.
The first virus was called "Rother J".
A virus replicates its DNA in a cell when it infects the host
A Lysogenic Infection
A polymorphic virus not only replicates itself by creating multiple files of itself, but it also changes it's digital signature every time it replicates.
A virus replicates inside a host cell. For example 'Bacteriophase'
A Prion. It transmits a mis-folded protein state, and replicates by causing the host's proteins to replicate into its mis-folded pattern. Mad Cow disease is an example of a prion.
The reason why a host cell is unable to make it`s protein while the invading virus replicates is because viruses typically not considered living organisms
A harmful program that replicates itself to other computers form yours.