Fridge Logic
- Early in the film, it's established that they're barring people from the hospitals. They're trying to avoid a concentration of people in a sealed environment resulting in a more deadly mutation of the virus.
- Except the writers don’t understand that viruses become deadlier mutations by adapting to different immune systems and medications; not by the virtue of ‘being in a sealed environment.’ The virus surprise at the end was with just one immune system and no medications. By that same logic, you could ‘engineer’ an exinction level virus by having a flu sufferer cough in a ziplock bag, and leave it sealed for 20 years.
