Factual error: The "African" monkey that they're chasing around is actually a South American species. It's also Marcel from Friends.

Continuity: When Kevin Spacey is rushed into the hospital after collapsing, the medical people rip his shirt off to apply ice bags. In the next shot they are stuffing ice bags up under his intact shirt.

Continuity: Throughout the film, Maj. Casey Schuler's hair is dyed strawberry blonde. In the scene where he convulses from being infected with the virus and is rushed to an available hospital bed, his hair color changes to his natural dark locks. In his death scene a few minutes later, his hair color is back to being strawberry blonde.

Continuity: As "Sandman" is making its bombing run, the bomb door is opened - in the next side angle shot of the plane, the door is shut again.

Factual error: The suits worn by dangerous disease researchers would definitely never tear if the hose was pulled.

Other: About half an hour into the film, Schuler and Daniels go down to the level 4 bio-lab. They pass through a number of doors that earlier and later in the film reqire an ID card or hand-print scan to access, but they don't use either on any door. (A security guard seems to usher them through one door, but surely such a high security lab would require positive ID at each entry point).

Continuity: The bomber approaching the town is military green in all scenes but one. One shot, however, is of a bright yellow plane. If that's just the sunlight, then note that a minute and a half later, the plane (which has supposedly been approaching from the same direction) now has sun shining on its right side rather than left.