If you have been bitten by a pet dog for half a month, it is not always safe and you should go for rabies vaccination and rabies passive immunization preparations in time. The incubation period of rabies is about 1~3 months, and a few incubation periods can be as long as 1 year or more. Therefore, if you have been bitten by a pet dog for half a month, it is not necessarily safe and may still be in the incubation period. You should go to an immunization station or health center in time to receive rabies vaccine and rabies passive immunization preparations as soon as possible to prevent rabies from occurring. Rabies has a 100% mortality rate. Therefore, once the risk of exposure occurs, the wound should be cleaned and disinfected as soon as possible, and the rabies vaccine should be administered within 24 hours, with or without rabies immunoglobulin, depending on the level of exposure.