Saliva is the substance that is secreted by the sublingual glands and glands under the jaw. The saliva contains a variety of substances such as protein, salts, water, which helps moisturize the mouth and eliminate the microbes in it, as well as it softens the food to facilitate chewing The saliva works to turn the starch through special enzymes, so the mouth is one of the areas where a number of dangerous microbes are collected, which can be transmitted from one person to another through the transmission of saliva from the infected person to the healthy person, through direct contact Between the mouth of the person SAB healthy person and mouth, or by eating foods and drinks contaminated with microbes, which leads to serious diseases, according to viruses transmitted. Salivary-transmitted diseases The viral hepatitis, which belongs to the family of bicoranoid viruses: It is one of the most dangerous diseases transmitted by saliva, which may cause death in cases where not received timely and appropriate treatment, and these viruses infect the liver in particular. AIDS, which is transmitted because of a defect in the lining of the mouth, which works on the destruction of the immune system is a large and lethal disease, the disease has not yet reached a cure to fight the virus that causes it. Syphilis, which is transmitted through sexual areas, causing significant damage to the injured person in several places such as the mouth, anus, and the lining of the uterus, and it appears in the form of sores in the mouth, and pink patches on the hands. Respiratory diseases, which affect the tonsils through viruses and microbes found in contaminated saliva such as: flu and flu, and move quickly. Herpes, which is transmitted from person to person regardless of age disease, viral disease transmitted to nerve nodes, causing its spread, and the disease appears in the form of mouth ulcers, and inflammation of the gums. Tips must be careful when eating foods and drinks, and make sure they are clean and free of any viruses that may lead to infections, in addition to that you should not eat foods by people using the same special Alamaalq and thorns tools; may contain saliva filled with viruses contagious, and must avoid diseases transmitted through the patient's mouth, such as kisses and others, for the protection of transmission; because the diseases they cause may be serious and cause death, and can be normal diseases disappear with the demise of the viewer and the virus that causes it.