Character mistake: During the interview with Dr. Sanjay Gupta, Alan Krumwiede incorrectly describes what an R naught of 2 means. He claims on Day 1 there were 2 people infected, then 4, then 16, then 256... This is raising each number to the 2nd power (squaring each number.) But we learned earlier in the movie from Dr. Erin Mears that the R naught indicates the number of people who will become infected by 1 infected person. So to calculate the spread of the disease, each # of infected should be multiplied by 2, not squared. It should go Day 1 = 2, Day 2 = 4, Day 3 = 8, Day 4 = 16, Day 5 = 32, etc.
Factual error: Shots are showed of different venues which you'd expect to be filled but are empty. Three shots are shown of an airport, the third a major international airport. In all three airport shots and especially the third, the airport is immaculate, the floors look like they were just waxed with a mirror shine, every item in its usual place. The previous shots shots, of Houses of Worship were realistic because things were in disarray, as you would expect. These places were abandoned rapidly and I'm sure there was no reason to have a cleaning crew come in right afterwards. But the airport shots look like that is exactly what happened, probably because in reality they were taken at about 3:30 AM, right after they had just be cleaned for the day.