A virus is like a Tupperware container. It is abiotic (never living), and just acts as a container storing deoxyribonucleic acid (DNA) for that specific virus. First, the virus attaches itself to a living cell. Next, it injects its own DNA into the cell. The virus's DNA instructs the cell to put ALL of its resources into copying the DNA and making more of the same virus. Last, the cell ruptures and the new viruses are set free to repeat the process.
they help replicate the DNA
Stomache virus
yes
Prions can cause an infection. They are simple proteins that can replicate under the right circumstances and one of them causes Mad Cow disease.
your cell
HIV is the virus. AIDS is the disease caused by the virus. (So HIV is not actually a disease per se.) As an analogue - the H1N1 virus can cause the flu.
Immediate cause is the first cause identified when a person is suffering from a disease. For example, if a baby is suffering from loose motions,we can say that the cause of the loose motions is an infection with a virus. So, the immediate cause of the disease is virus.
Respiratory tract
The monkeypox virus does go through a lytic cycle in order to replicate. This virus is a zoonotic disease that can affect both animals and humans.
Any virus can usually cause a severe disease or death.
Nucleus
A virus does not cause a disease but it will weapon your immune system and make you more susceptible to contracting diseases.