Acute hepatitis B mainly occurs in adults. If it is a child, because the immune system of children is not sound enough, after infection with hepatitis B virus, many of them will turn into slow hepatitis B. If it is an adult, after infection with hepatitis B virus, 95% of adults can get rid of the virus, and at most 5% of patients will turn into slow hepatitis B. But 95% of people who get rid of the virus may not have acute hepatitis symptoms. But 95% of the people who clear the virus, not necessarily everyone develops the disease, only some of them, a very small number of people may have acute hepatitis symptoms, some may even be very serious, may appear jaundice, but the prognosis of treatment in this case is generally better.