Vaccination against hepatitis A is the most effective way to prevent hepatitis A. The vaccines currently used in the domestic market to prevent hepatitis A can be divided into two types: domestic live attenuated hepatitis A vaccine and imported purified inactivated hepatitis A vaccine. The domestic live attenuated hepatitis A vaccine is effective, convenient and inexpensive, and the domestic hepatitis A vaccine requires only one dose; the imported hepatitis A vaccine is a dead vaccine and requires two doses, with a second dose 6 months after the first dose. A high level of antibodies can be produced about 8 weeks after vaccination with hepatitis A vaccine, and good immunity can be obtained. The antibody positivity rate can reach 98%-100%, and the immunity lasts for 5-10 years, so that the immunity against hepatitis A virus can be maintained after 5-10 years. How much does the hepatitis A vaccine cost? The price of the vaccine is regulated by the state, domestic vaccine and imported vaccine, the price of these two hepatitis A vaccines are different, parents can choose according to the family and baby’s physical condition. 1, China has developed the latest hepatitis A vaccine, the price is about 90 yuan, and half a year need to booster again, after the production of antibodies can basically last about 20 years. 2, about 20 yuan hepatitis A vaccine is recommended not to play, that is the former domestic hepatitis A vaccine, and the instructions also only once, and this vaccine is a live vaccine, a large number of clinical surveys show that this vaccine can only last 1-2 years on average, due to individual differences between people, and some people can only last a few months. 3. Another kind of vaccine is the imported hepatitis A vaccine, which costs about 140 yuan and needs to be given twice, but it can be maintained for more than 25 years after antibodies are produced. Therefore, if family conditions allow, it is recommended to take the 90 yuan domestic or 140 yuan imported one, and there is no age limit for hepatitis A vaccination, as long as you are at least 1 year old can be vaccinated. The validity period of hepatitis A vaccine varies depending on the type of vaccine. Inactivated vaccines, which consist of purified whole virus particles after inactivation, are valid for about 20 years, while live attenuated vaccines generally last about 5 years. Parents are advised to take their children to a regular hospital for hepatitis A vaccination and not to go to an unlicensed clinic for the sake of a moment of cheapness or convenience.