Mistakes
So right before the containment team seal up the window with the tarp, the SWAT is shown having police dogs. The virus (which came from a dog in the first place) can be transferred through saliva. The SWAT obviously overlooked the fact that the potentially infected people who might escape could be bitten by the dogs. See more...
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Cesar: When are we starting?
Ángela: We did.
Cesar: Why didn't you tell me? Don't you see my face is shiny?
Ángela: There are incredible security measures in place. We know nothing. They haven't told us a thing. We saw special forces, health inspectors wearing suits and masks, and it's not very comforting.
Cesar: There's something more to this place. Our cells don't work. Neither does the T.V. or radio. We're isolated.