What we know today about demonology
Okay, for starters, this was a science fiction horror hokum. But in light of today's great interest in paranormal research, we know several things.
The movie tried to spin some kind of scientific bent on capturing an entity that was not visible. There was a deliberate attempt to stay away from any kind of religious or supernatural explanation. But there was no invisible extraterrestrial being harassing Carla Moran.
In light of today's paranormal research, Carla Moran was the victim of a demonic attack, from a malevolent being that is indigenous to earth and not outer space.
What the movie did portray well, if boringly long-drawn out was the science team's attempt to first determine there was absolutely no psychological basis to Carla Moran's problem.
It's impossible not to go into a religious interpretation. The Roman Catholic Church wholeheartedly embraces modern psychology and psychiatry to predetermine whether there an alleged possessed person is not actually suffering from some kind of psychosis. In a great sense, this has tremendously helped religious authorities from separating away the 99% who just need psychiatric care. But ahhh, there is the remaining 1% for which when all is said and done, clearly demonstrate demonic possession.
In today's definitions of demonology, Carla Moran was suffering from, 'demonic oppression'. This is when a demonic presence has zeroed in on a particular individual to harass and inflict terror, oppression, and anything that might weaken the victim even further. The victim is typically not possessed but the demonic presence is already insinuated into the person in some way. This can lead to the last step of, demonic possession.
Whether a victim of demonic oppression, or worse, demonic possession, a victim is in need of specifically and specially trained religious ministry able to confront and force out the demon or demons. Even if the scientists could discern a demonic presence attached to Carla Moran, there was little else they could do and attempting to cryogenically seal in the entity showed us that demons cannot be captured or restrained like wild beasts.
By the time a person is being tormented by demonic oppression or possessed, the only way to go is to contact religious authorities for help. But first, the person has to be fully psychiatrically evaluated.