Hepatitis A vaccination is required. Hepatitis A is a viral infection transmitted by the fecal-oral route, which in rare cases can lead to liver failure. Hypersensitivity to the hepatitis A vaccine or components of the preparation is a contraindication to this vaccination. Hepatitis A vaccine can also be administered during pregnancy and in individuals with impaired immune function. Generally, protective antibodies are produced eight weeks after hepatitis A vaccination. Moreover, the hepatitis A vaccine is preferable for all individuals susceptible to the hepatitis A virus, as long as they are children or adults over the age of one year. Hepatitis A is an infectious disease induced by the hepatitis A virus, and people who are negative for hepatitis A antibodies are susceptible to infection. People who are negative for hepatitis A are also susceptible to infection if they share utensils with someone who has hepatitis A or if they accidentally consume food or water contaminated with the hepatitis A virus. If the vaccinated person develops fever and other physical symptoms after vaccination, he/she needs to communicate with the doctor in time and go to the hospital for treatment.