Contact transmission includes direct contact transmission and indirect contact transmission: 1, direct contact transmission refers to the middle is not through other items, the pathogen directly caused by the infection, the most commonly said direct contact transmission, including kissing and sexual intercourse. Kissing, sexual intercourse itself is close contact to occur, so if there are suspected symptoms of infection is not recommended to appear the above behavior. 2, indirect contact transmission refers to indirect contact with contaminated items caused by the transmission, such as hands and daily necessities (bedding, toys, eating utensils, clothing, etc.), by the source of the excreta (such as fecal matter may be present in the spread of the transmission, can not be completely sure), or secretions (coughing. sneezing accompanied by excreta), or secretion, Sneezing (coughing, sneezing) contaminated by the hand contact, and then touch the mucous membranes of the nose, mouth, eyes, etc. and thus enter the body. Therefore, the main prevention method is to wash hands frequently.