Scratched by squirrels need to be injected, mainly to prevent the three major problems of renal syndrome hemorrhagic fever, tetanus and rabies. There are bacteria and viruses on the paws of squirrels, if the injury bleeds may be infected with the bacteria and viruses it carries, it is important to clean the wound promptly and thoroughly, and when the wound is too deep, it also needs to be cleared with the help of a doctor. Can be intramuscular injection of tetanus vaccine, no later than 24 hours; after being bitten by a squirrel may have renal syndrome hemorrhagic fever, to immediately go to the hospital for hemorrhagic fever vaccination; squirrels may carry rabies virus, but the possibility of morbidity is very small, generally do not carry out the relevant treatment, if not assured, the injured person can choose to inject rabies vaccine. After the above series of treatment, the disease can usually be avoided, and the injured person needs to protect the wound to avoid further infection.