Demon
The contemporary Roman Catholic Church unequivocally teaches that angels and demons are real beings rather than just symbolic devices. The Catholic Church has a cadre of officially sanctioned exorcists which perform many exorcisms each year. The exorcists of the Catholic Church teach that demons attack humans continually but that afflicted persons can be effectively healed and protected either by the formal rite of exorcism, authorized to be performed only by bishops and those they designate, or by prayers of deliverance, which any Christian can offer for themselves or others.
Exorcism
Beliefs and practices pertaining to the practice of exorcism are prominently connected with Hindus. Of the four Vedas (holy books of the Hindus), the Atharva Veda is said to contain the secrets related to exorcism, magic and alchemy.
The basic means of exorcism are the "mantra" and the "yajna" used in both Vedic and Tantric traditions. Vaishnava traditions also employ a recitation of names of Narasimha and reading scriptures, notably the "Bhagavata Purana" aloud.