Normally, body fluids are not contagious to food, but if the eater has a disease such as oral mucous membrane damage, there is a certain chance that he or she will be infected with the virus if the food is eaten by a normal person. Some disease viruses that are transmitted through body fluids, such as HIV, are eaten by normal people if they get HIV-containing body fluids on food. The food will come into contact with the mucous membranes of the person who eats it in the process of digestion, and at this time, if the person who eats the food has a disease such as mucous membrane damage, there is a certain chance that he or she will be infected with the virus. In daily life, it is recommended to consume food from regular and processed sources, and not to consume food from unclean and unknown sources, in order to avoid adverse consequences and health effects. If one accidentally eats food stained with body fluids and there is a wound inside the mouth, it is recommended to go to the hospital for a medical checkup in time to prevent disease infection.