At around the 53 minute mark, two jeeps cross a small stream in a field. There's a slight hitch between when the first and second jeep cross, and when the camera pans, the first jeep is much farther ahead of the second than it was before, suggesting that a section of film is missing.
When talking on a field radio while working in the high school science lab, Dr. Watts talks without pressing down the "talk" button on the radio's handset. The person he's talking to wouldn't be able to hear him unless he pushed the button, yet the conversation continues.
The character Richard France plays is named Dr. Watts, but at one point identifies himself as Dr. Elston (and is called "Ellie" at another). Actually, he identifies himself as "Watts, Dr. Elston" for a voice check.
In one of the lab scenes, Dr. Watts becomes excited because the lab specimen he's examining is smaller than it was. He asks for another slide of the same sample, but when he looks at that sample he's excited because it's bigger than all the others.
It is stated repeatedly that the pathogen is a virus, but several references are made to it being a "bacteriological" weapon, as if viral infections and bacterial infections are the same thing. The female lead also takes an antibiotic that slows her response to the pathogen, but antibiotics are for bacteria and wouldn't help against a virus.
When the government suits are arguing about getting a member of the Trixie team into into the town one of them demands that a plane be sent and waiting at Fort Detrick to pick up the first one to arrive. However Fort Detrick is only equipped with landing pads for helicopters. There is no on site runway so a plane landing or taking off from the actual base would impossible.