Last night in The Walking Dead Season 4, AMC brought us "Infected", an episode that spoke about a new danger to the group. A deadly threat presented itself to the prison gang - and it wasn't the hungry undead!
Take a look at these official stills from the episode, and see if you can piece together what happened with those those dead animals and eye-bleeds...
...Swine flu? What do you think is the cause of the infection?
The Walking Dead Season 4 airs on Sundays at 9/8c on AMC.