On the first hand, there is a reason why superstitions still exist and the reason is that superstition can be very comercial and some busines make money of that, for example, with the horoscopein too much magazine. On the other hand today science has evolve to prove that superstitions are an stupidity.
In conclusion, I can say that superstitions behind a scientific study can be certainly something thatyou would never believe but it is a thing that will never totally disappear, there will always be a point of belief about that.