Is the music featured on the soundtrack from the following scene: Hunt escapes from a building leaving Nyah behind after she infects herself with Chimera?
You won't find it on the M:I-2 soundtrack because its full of music not featured in the movie, but it is on the M:I-2 score which does. The track is called 'Injection' and it covers the entire scene. The score was written by Hanz Zimmer - the guy who also wrote the Gladiator Soundtrack. Hope this helps! :o)