It is narrated from Hazrat Abu Huraira (may Allah be pleased with him) that the Holy Prophet (peace and blessings be upon him) said: No disease is contagious, the month of Safar is not unlucky, and there is no reality in the worm coming out of the skull. A Bedouin said: Then what about the camels that run around in the desert like deer, and suddenly a mangy camel joins them and makes all of them mangy? The Holy Prophet (peace and blessings be upon him) asked him: From where did the first camel get the mange?