DPT generally refers to the DPT vaccine. Neuritis, anaphylaxis, rash and general adverse reactions can occur with the DPT vaccine, and the time of occurrence of different adverse reactions varies from a few minutes to about two weeks. 1. Neuritis: DPT vaccine causes neuritis as an adverse reaction, usually in 5~7 days or about two weeks after vaccination. 2. Anaphylaxis: Anaphylaxis usually occurs earlier, and some adverse reactions may occur within minutes or hours after vaccination. 3. Rash: Rash usually appears a few hours or days after vaccination. 4. General reaction: usually around 12~24 hours after vaccination, there may be localized redness, swelling, pain and other adverse reactions. If the adverse reaction is mild, it can be observed temporarily, if the adverse reaction is more serious, you need to consult a doctor in time.