Hepatitis B vaccination more often is generally not allowed in theory, and this type of vaccination is not always effective. The Hepatitis B vaccine is not better the more times you get it, there is a set time and number of times you can get it, so getting it more often is not always effective. And frequent hepatitis B vaccinations may also have unwanted effects on the body. Hepatitis B vaccine will usually require one shot at birth, one month, and six months, for a total of three shots; some high-risk groups may need a hepatitis B booster shot, which is designed to boost immunity. However, it does not mean that the more shots you take, the better the results and the stronger the immunity, because the individual’s physique is different, and the immune effect produced by the hepatitis B vaccine in the body also varies. Hepatitis B vaccine should know that it is not recommended to get vaccinated when you have a cold, fever, asthma, hives and so on, so as not to aggravate the adverse reactions. After receiving the hepatitis B vaccine, you should seek medical attention if you develop itchy skin or a red rash. Before receiving hepatitis B vaccine, it is recommended to go to the hospital to check whether there is antibody, if no antibody exists, a booster shot can be given, but under the guidance of professional physicians.