Neither of these things happened and I have no idea why you think they would have.
Jake injected himself at the start of his campaign like his merc buddies did. Because of his immunity, he didn't go J'avo. --- (http://i45.tinypic.com/2v820w2.gif) (pending edit...) ATTN: Grammar Nazis: http://i1061.photobucket.com/albums/t469/kurotem/4c5fc1a3.gif
Umm what are you talking about, Jake injects himself with the C virus at the beggining of his campaign and Sherry was looking for him because he could produce the antibodies because Jake has the perfect immune system like his father Albert Wesker.