Stem Cell Research
Advancements in stem cell research have mostly been positive, with cancer treatment being the main focus. However, one wrong move from a mad scientist and we could have a real life zombie virus that infects our brains and internal systems.
Cocaine is a heck of a drug. The illegal substance is addictive and leads to heart attacks. Some people are even turned into zombies, consuming human flesh in the midst of a wild attack while on the drugs.