The new coronavirus vaccine, i.e., the new coronavirus pneumonia vaccine, does not usually affect the timing of menstruation after vaccination. The new coronavirus pneumonia vaccine is an inactivated vaccine, and the common adverse effects after vaccination include redness and swelling in the injection area, occasional fever, headache, malaise, etc. There is not enough research evidence to suggest that it may cause delayed or early menstruation. Adverse reactions to the new coronavirus pneumonia vaccine generally do not require special treatment, and most of them can be relieved after a few days, but if the discomfort is severe, it is necessary to consult a doctor immediately. In addition, before and after vaccination, you should avoid alcohol and spicy food, and pay attention to rest. Given that there is no evidence that vaccination with the new coronavirus pneumonia vaccine affects menstruation, if you have normal and regular menstruation, and there are no special changes in your daily life and routine, and you experience delayed menstruation after vaccination, you need to consult a doctor as soon as possible to clarify the specific causes of delayed menstruation, and then follow the doctor’s instructions for treatment. Tip: “New coronavirus pneumonia” and “new coronavirus pneumonia” mentioned in this article were renamed to “new coronavirus infection” on December 26, 2022, as announced by the National Health Commission.