Fear The Walking Dead’s Cliff Curtis has an interesting theory on how the zombies in AMC’s great zombie survival drama franchise came to exist.

In the world of AMC’s The Walking Dead, there isn’t any way of knowing how the zombie origin started. While some theorize about an alien invasion, poisoning of the water, airborne disease, or medical trial gone wrong, there is still no definitive answer to the beginning of the outbreak.

Recently, one of the stars of Fear The Walking Dead gave his opinion on what the cause of the outbreak could have been and why it would have spread so quickly.

Here is his idea thanks to CinemaBlend.com:

“It’s not on the show, but what I think is a really strong possibility is that all of the government laws around immunization of children and how it’s illegal to not be immunized, so that you have all of these kids who, for generations, are immunized, but then something goes wrong and you have thousands and thousands and thousands of people, all around the world, buying these immunizations for flu shots or to fight bacteria or disease, and we’ve basically become over-immune and our immune system takes over and refuses to let the body die. That’s my theory.”

Curtis has what is probably the most likely theory I’ve ever heard in regards to The Walking Dead‘s zombie origin. So many people get immunized or have their children inoculated that a disease spreading that way would be easy. It’s a quick way to int

However, it doesn’t explain how those who don’t get flu shots are infected or how the rest of the population came into contact with the disease. While it’s possible we’ll likely never know how The Walking Dead’s zombie outbreak started, it sure is fun watching the hit AMC zombie show us what is happening after the dead come back to life.

Do you have any theories on how the outbreak started on The Walking Dead? What do you think of Cliff Curtis’ theory? Let us know in the comments below.