According to the search results, the chances of a zombie outbreak are extremely unlikely, but not impossible. Here are some key points from the search results:

• Zombie apocalypses have been portrayed countless times in movies, shows, and video games, but they are fictional.
• There is no proof that a zombie apocalypse could be on the horizon, but anything can happen.
• Some illnesses mirror the traits of zombies, such as rabies and leprosy, which could mean we may end up having a “zombie” variant on our hands.
• Scientists have researched whether there is a virus that could cause an apocalypse, but none have had a breakthrough.
• Realistically, the only chances of a zombie apocalypse would be some strain of rabies, but the human brain is too complex for rabies to actually control, so the virus just kills its host.
• Even if a zombie-like virus were to exist, it would spread very slowly over a large area, and it would be much easier to contain than a mutant virus.
• The possibility of a human zombie pandemic is extremely unlikely, but not impossible.

In conclusion, while a zombie outbreak is not impossible, it is highly unlikely.