Researches have shown what to kiss it is not absolutely harmless, as except herpes there is a ten more infectious diseases which are transferred through a saliva from the person to the person.
At hit in a human body, an infectious mononucleosis provokes the raised temperature to 40 degrees then does not fall down about two weeks. Besides given infection enlarges lymphonoduses then the throat swells and pawns a nose. Also there can be abdominal pains. Children of 3-10 years are ill usually, but adults if immunity is considerably lowered can also.

Cytomegalovirus infection is similar enough with virus infections which is accompanied by rise in temperature, a cold, a pharyngalgia. Cytomegalovirus infection can be at the person all life, but during an exacerbation lasts about one and a half months. To be afraid this infection it is necessary to pregnant women as in the raised condition it is capable to cause defects.

Besides these infections can be and the peptic ulcer of a stomach proceeding practically without symptoms. Some feel an acute pain under the right ribs right after of food intake or through any time after meal.

If immunity is weakened, it is possible to catch also a dysbacteriosis and other not less terrible diseases.