From onisamas.blogspot.com, an awesome site about the supernatural beliefs of the Japanese people. Check this site out, it’s awesome and very informative!
"Ghost sickness is spread by a specific class of spirit known as the Buruburu. First, one must have physical contact with the ghost’s body or the body of a ghost sickness victim. Second, one must share a specific personality trait with the original killer of the Buruburu. As a result, not everyone who comes into contact with a Buruburu or someone with ghost sickness is susceptible to the virus.”
"Buruburu is a ghost, resulting in the brutal murder of human fear. He roams around the neighborhood and emit ghostly disease. Of exposure can touch the corpse of the murdered or having any connection with the killer. Kinship or friendship link is particularly dangerous because of the first ghost revenge killer and his family. infected with a disease in a person starts to feel the growing fear and dream terrible nightmares. This fear is being updated, shivering man, he kept vomiting, hallucinations occur. Life becomes impossible and the patient eventually dies of a heart attack. Cure Haunted disease sick man can be killed just the same ghost.”