hi;
thanks for the reply;good that you consulted gastroentrogist.remember your friend can infect by close contact means not by touch or hand shake;this is like if his body fluid that is saliva; blood;sperms ;pus or any such body fluid comes in contact with any person he can pass this virus (like example of
HIV ).So he is your friend & you should help him but take precautions & also tell him to take precaution not to spit in open ;don't use common things & everything should be fine.If any query be free to ask.
thanks