According to government information, 7.2% of Hong Kong's population is currently infected with hepatitis B virus. Newly infected infants and young children have no obvious symptoms, while infected children and adults have a 30% to 50% chance of developing hepatitis-like symptoms. Infected by hepatitis B virus without knowing it, the condition can develop into lifelong chronic hepatitis B, and there is a chance of liver cirrhosis, liver cancer or acute liver failure in the long run. Accept relevant examinations and treatment as soon as possible to stay away from hepatitis B patients.