There is some misinformation floating around claiming that measles can cure cancer. As with most misinformation, this is an oversimplification of a recent clinical study.
Measles has been plaguing humanity since around the 12th Century AD. It used to be that the lack of medical care and a vaccine were what caused the epidemics of measles. Today, the causes are mostly due to the human condition: to believing myths, spreading misinformation, inequalities in the delivery of healthcare and public health services, and the willingness of some people to make a buck off the fears of those who are not equipped to know better.