In general, the nine-valent vaccine should not be left at room temperature for more than 24 hours. In the regular storage procedure of the vaccine, it should be stored at 2-8℃ and the validity period is usually about 6 months, beyond which it may be inactivated, and it should not be frozen. If stored at other temperatures, it should not be kept for more than 24 hours and should be used as soon as possible after opening. If the vaccine is precipitated or cloudy when you take it out and prepare to use it, it is possible that the vaccine has deteriorated because of the production batch or improper storage, so you need to stop using the vaccine immediately and consult with the relevant professionals about the vaccination.