Explain why a virus can\'t infect every cell Explain why a virus can\'t infect every cell Solution Virus is a small infectous agent that present in every body ie.,humans,animals,organisms and also including bacteria and exists in the form of independent particles knwon as Virons.Virus cannot infect every cell because every cell in our body is resistant to virus and it has high immunity inorder to avoid attack from virus. If the immunity of the cells decreases then the chance of attacking by virus increases more and leads to some viral diseases such as viral fever etc..The diet which we take daily contains proteins and nutrients etc..will give full resistance to our body and also increases immunity. This perfect immunity in the body doesnt allow any virus attack on our cells and always keep us healthy..