Contagion

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. (01:06:35)

acemutou

Continuity mistake: When a guy brings flowers to mourn for Mitch's wife, he is in the kitchen, stands up and runs to the door. When the angle changes, a frame later, he repeats all the previous movements.

Sacha

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Dr. Ian Sussman: Blogging is not writing. It's just graffiti with punctuation.

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Trivia: As part of the advertising, two huge petri dishes were specially treated with bacteria and put in a shop window. They slowly grew and developed, ending up displaying "Contagion" with hazard signs.

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Question: After Alan Krumweide starts spreading misinformation about Forsythia curing MEV-1, we see a scene in a pharmacy being flooded with desperate customers. But if Forsythia is a homeopathic drug, then why is it being sold in pharmacies in the first place? As the characters say later on, it takes months just to get a drug approved, let alone sold.

Answer: Many pharmacies in the US sell homeopathic supplements.

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