If you are in a non-infected area, the chances of developing a disease after being bitten by a rat are not particularly high, but it should be taken seriously. If you are in an infected area, such as the plague, the chances of developing a disease after being bitten are greater, and it is recommended that this group of people be vaccinated against the appropriate disease. If you are in a non-infected area, if you are bitten by a rat and the skin is not broken and there is no bleeding, the chances of developing a disease are not very high. However, if you are bitten and then develop bleeding, redness, swelling, or even fever, you are likely to be infected with infectious diseases such as bubonic plague, epidemiological hemorrhagic fever, and rabies, etc., because rats belong to the mammal category, and they can carry a wide range of infectious pathogens such as the bacillus of plague, the hantavirus, and the rodent-bite fever spirochete, Rabies virus, etc. Once bitten and bleeding, there is a possibility of being infected. In the epidemic area of plague and other diseases, it is recommended to get vaccinated in advance, now the plague vaccine used in our country is EV76 plague frozen bacillus vaccine, the immunization period of this vaccine is six months, in the plague epidemic 1-2 months before the vaccination, if bitten by a rat can be disinfected with soapy water or iodine, as soon as possible, go to the local hospital for injection of hemorrhagic fever vaccine and rabies vaccine. Do a good job of exterminating rats and fleas at home and in the surrounding environment, and disinfect the infected area. If you have been in contact with a plague patient you can take oral medication for prevention. In order to avoid being bitten by rats, you need to pay attention to the cleanliness and hygiene of the living environment in your daily life, clean up the garbage in time, and don’t pile up sundries in the house to avoid breeding rats. When bites occur, you should seek medical attention in time.