You need to make three appointments for the first time for the nine-valent HPV vaccine, and you must make three appointments because the nine-valent HPV vaccine is a three-shot vaccine. You have to make an appointment for the HPV vaccine. If you don’t make an appointment for the second and third injections when you get the first injection, the timing of the injection may be affected if you don’t make an appointment when it’s time to get the injection. After the first injection of the nine-valent HPV vaccine, the second injection will be given at an interval of two months, and after the second injection, the third injection will be given at an interval of four months, that is, the 0-2-6 injection method, so that the injection can have the best preventive effect according to the regulations. After the first injection of the HPV vaccine, the second and third injections should be given according to the doctor’s appointment, and try not to change the injection time. If you feel unwell during the period, you should contact the medical staff in time.