For centuries, the list of 10 most terrifying ghosts in human history below has always made many people afraid.
Once using the bizarre drug, young people will fall into a zombie-like state, sleeping motionless for hours and acting extremely strange.
Clare Sammells, an anthropologist at Bucknell University, points out the difference between COVID-19 and the zombie pandemic if it happens in real life.
The legend of two bloodthirsty monsters - often appearing in Hollywood horror movies - stems from a real-life disease. It is rabies.