Whether or not you can get the third vaccine when you are on your period (menstruation) generally needs to be determined by the type of vaccine. Common vaccines include the new coronavirus vaccine, etc., cervical vaccine, hepatitis B vaccine, etc. You can get the new coronavirus vaccine and hepatitis B vaccine during menstruation, but not the cervical cancer vaccine. Generally, you can get the new coronavirus vaccine and hepatitis B vaccine during menstruation, and the current new coronavirus vaccination program for women is not affected by menstruation. Hepatitis B vaccine is very safe and is a product of genetic recombination, and the likelihood of adverse reactions in vaccinated individuals is very low. Avoid cervical cancer vaccination during menstruation. The body resistance is lower during menstruation, and it is easy to produce uncomfortable symptoms after vaccination. It is generally recommended that the cervical cancer vaccine should be administered 2-3 days after the end of menstruation. It is recommended to take the vaccination according to your own specific situation, and please consult the doctor in time if you have any discomfort, so as to avoid delaying your condition.