Abstract: This invention relates to a method of producing an auto induced biological barrier against spermatozoids and/or other microorganisms including viruses and/or pre cancers or non invasive cancers involving the production of an autoimmune reaction in a host in need of such auto-inducement.

Abstract: This invention relates to a method of inducing an auto-immune reaction in a host in need of such inducement. The invention is characterised in that stressful stimuli are applied to the vaginal and cervical mucosa by warming, prior to sexual intercourse, said vaginal and cervical mucosa to a physiologically acceptable but stress inducing temperature degree. The invention also relates to a device for using said method comprising a hollow body (1) provided with a heat source on the inside as well as with a means (13, 27) of removal of said hollow body from the vaginal or rectal cavity and a means (6, 8, 10) capable of exchanging heat originating from the hollow body.