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Visible crew/equipment: When JD shoots the zombie female in her leg you can see the square outline of the pack behind her leg that 'explodes' and makes the hole in her pants. (00:38:10)
Visible crew/equipment: When the team leader asks Alice for her report, if you look in the reflection of the eye pieces on his mask, next to Alice's head, you can see a man wearing jeans. This happens twice. (00:13:23)
Visible crew/equipment: When the camera moves in on the security door at the Hive, the reflection of the camera operator can be seen moving in the chrome. (00:19:20)
Answer: Actually the T-Virus was originally meant as a cure for a genetic disorder that Dr. Ashford and James Marcus daughters suffered from. The reanimation was a side effect and James Marcus was killed by Dr. Alexander Isaacs so he could take control of it and turn it into a bio-weapon.
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