Ok, this isn't exactly weekly. But there definitely won't be more than one in the same week. A Vatican supported university in Italy is offering its second course on exorcisms. With only a few exorcisms appearing in major Hollywood films, you might think that demon possession is a small problem in this world. You would be wrong. Bishop Andrea Gemma told the class that he performs "at least for exorcisms a week." The Vatican's leading exorcist, Father Gabriele Amorth, claims to have conducted 40,000 exorcisms.
So what can you do to protect yourself? Well, there are always religious accessories to be found. Make sure you always have a good crucifix, some holy water, and bible on your person at all times. Also try humility. St. John Vianney found it to be mankind's ultimate advantage over the devil. However, the best way to protect yourself seems to be distancing yourself from the Catholic Church. Demon possession is most common in Catholics, former Catholics, and people with Catholic families. The number of cases are much lower for Baptists, Mormons, Hindus, Atheists, and pretty much everyone else.