What EXACTLY started the infection in Left 4 Dead?

Channel:

Wow Such Gaming

Subscribers:

823,000

Published on August 17, 2017 5:29:57 PM ● Video Link: https://www.youtube.com/watch?v=rNt1Q7xVjV4

Game:

Left 4 Dead 2 (2009)

Duration: 7:39

1,010,085 views

22,828

The infection had to start from somewhere, right? Lets take a quick look into just how it could have all started!

I made this video in a night due to time constraints so I apologize if the quality seems less then the previous EXACTLY video.

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