Everyone has heard of hepatitis B and there is an inexplicable fear of it. But all you have to do is remember one thing, and you won’t be afraid of hepatitis B anymore. It is difficult to treat hepatitis B, but not difficult to prevent. The prevention of hepatitis B is still quite simple. The following is a brief explanation of hepatitis B related prevention knowledge. I. What is hepatitis B? Hepatitis B virus (HBV) infection is one of the most common infectious diseases in the world, with more than 400 million people having chronic HBV infection and about 1 million people dying each year from HBV-related chronic hepatitis, cirrhosis or hepatocellular carcinoma (HCC). There are eight types of viral hepatitis, namely viral hepatitis A, B, C, D, E, F, G and TT. Among them, the infectious disease caused by hepatitis B virus (HBV), which is mainly liver lesions and can cause multiple organ damage, is called hepatitis B, or hepatitis B for short. Clinical manifestations are mainly loss of appetite, nausea, fatigue, liver enlargement and liver function abnormalities, some cases can become chronic, and a few can further develop into liver cirrhosis and liver cancer. China is a high endemic area of HBV infection, the general population HBsAg positive rate of 9.09%. Second, what burden does hepatitis B bring to us? According to the relevant departments, the number of new cases of hepatitis B in China is about 500,000 every year, accounting for 1/4 of the total number of reported infectious diseases in the country, and most cirrhosis and liver cancer develop from hepatitis B. Hepatitis B not only seriously affects human health, but also causes heavy economic burden to families and society, and becomes an important factor of poverty due to illness in poor areas. For example, life expectancy decreases; quality of life is lost; lifelong treatment of liver disease and complications caused by HBV infection is expensive; HBsAg positive patients, more chances of hospitalization, longer hospital stays and health care costs increase with the progression of CHB. Third, what are the ways of transmission of hepatitis B? Hepatitis B transmission is mainly through the following: 1, blood transmission: mainly including blood transfusions and blood products, syringe needles and needles, dental and surgical instruments and other medical acts, tattoos, eyebrow tattoos, ear and eye piercing, double eyelids, shaving and other cosmetic acts with damage. 2, mother-to-child transmission: refers to the mother carrying the hepatitis B virus during pregnancy, childbirth, breastfeeding will be a way of transmission of hepatitis B virus to the baby. Surface antigen (HBsAg) positive mothers have 40%-50% transmission of hepatitis B virus to their babies, surface antigen (HBsAg) and e antigen (HBeAg) double-positive mothers have 90%-100% transmission of hepatitis B virus to their babies. 3, sexual contact transmission: male and female sex can be transmitted through semen, vaginal secretions hepatitis B virus. Knowing the transmission route of hepatitis B, the prevention of hepatitis B is not difficult, the main preventive measures are as follows to strengthen the publicity and education of hepatitis B prevention knowledge. Strengthen the management of personnel in the catering industry, caregivers and other special industries. Conduct hepatitis B vaccination. Implement mother-to-child transmission interruption. Strict monitoring of blood donors, blood and blood products, and strict sterilization of medical devices to prevent medical transmission. Individuals should be aware of hepatitis B transmission routes and prevention knowledge, develop civilized and healthy hygiene habits, and avoid contact transmission by not sharing toothbrushes, razors, and eating utensils. Among them, hepatitis B vaccination is the most economical and effective way to prevent hepatitis B, and its safety is also recognized by the medical community.