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The H.C.F did come to take Steve, but not nessecarily to help him. They were sent to get a sample of the T-Veronica virus, and since Alexia was killed by Chris Redfield, Steve is the only one who remained with the T-Veronica virus in his DNA. Wesker taunts Claire near the end of the game saying that Steve might even be revived, but it is unknown if this actually happened. The information may be revealed in Darkside Chronicles, which is yet to be released.