Someone with hiv/aids positive want to insure his life to want extent can he go?

The insurance policy options for this person will be extremely limited. Most insurers, if you want a larger policy, make you take a medical exam. They would have to go with an insurer who does not do medical exams or get several smaller policies instead.

There may be a few limited policies in lower amounts ( and high premiums) and of course accident insurance, to pay if he dies in a accident.

The worst health someone has the harder it is to get life or medical insurance

Chuck, I know that life insurance companies only want to cherry pick the healthy people. It's unfortunate, but they are for profit companies so they have no other choice.