In this task you will be given a process, and a question. The process contains a sequence of steps that happen in order. The question asks about the effect of a certain event on another event. If the first event has a positive effect on the second event, answer with "for", if it has a negative effect, answer with "against". If there's no causal relationship between the two, answer with "none".
Q: Process:  -Contact is made with a virus -The virus enters the human or animal body -The virus goes to the part of the body that contains its food -The virus consumes part of the body or materials that the body uses -The virus replicates and spreads -The virus causes symptoms in the body as the immune system tries to expel the virus.
 Question: What is the effect of a person has a damage immune system already on more cells being damaged.?
A: 
for