Why do mutated forms of viruses, which have altered surface proteins, pose a monitoring problem for

person's memory cells?

Why do mutated forms of viruses, which have altered surface proteins, pose a monitoring problem for a?spyware removal

Those surface proteins are the mechanism by which the immune system recognizes the virus. This is the basis of T-cell mediated immunity. If the virus can change its surface antigens, it can ''slip by'' the surveillance of the cellular immune system, and set up an infectious disease state without the body mounting a defensive immune response.

Why do mutated forms of viruses, which have altered surface proteins, pose a monitoring problem for a?virus protection software

Because they keep information of one form of virus, but as it changes its surface proteins they will not immediately recognize it as the original one.

They ''remember'' one guy, but the same guy came again in a disguise.