You'll want to sanitize after watching this video. It explains how terrifyingly fast an epidemic would spread across the world. The answer: INSANELY FAST.

Theoretical physicists have created a model to show a disease originating from one city can taint the other and the rest of the world. Theoretical physicist Dirk Brockmann and his team created a simulation using a hypothetical epidemic that had similar characteristics to the 2009 swine flu pandemic within the context of our globalized world.

You can read more about Brockmann's study here.



That's like World War Z!