After the nine-valent vaccine, you can eat seafood appropriately if you do not have any uncomfortable symptoms. Nine-valent vaccine generally refers to the nine-valent HPV vaccine, which can be used to prevent cervical cancer caused by HPV infection. Some patients may have allergic reactions such as itching and redness of the skin after vaccination, and it is not recommended to eat seafood in such cases because seafood belongs to allergenic food and may aggravate the allergic reactions after eating it. If there is no discomfort after vaccination and people who are not allergic to seafood can eat seafood appropriately. If the patient has any discomfort after vaccination, it is recommended to go to the hospital in time.