Mosquitoes do not transmit hepatitis B. However, it is important to note that the hepatitis B virus can be transmitted, for example, through the blood route. Since the hepatitis B virus is unlikely to survive in mosquitoes, the blood remaining on the mosquito’s mouthparts is minuscule and the level of hepatitis B virus is very low. Once it enters the body, it may be cleared by the immune system in time. The main ways of transmission of hepatitis B in China are mother-to-child transmission, sexual transmission and blood transmission. If the body is infected with hepatitis B virus when the immune system is low, it is easy to become a hepatitis B virus carrier. If a pregnant woman has hepatitis B, failure to perform mother-to-child interruption can result in the newborn becoming a hepatitis B carrier. If the level of hepatitis B virus is high late in pregnancy (after 26 weeks of gestation), antiviral treatment is needed to further reduce the risk of hepatitis B infection in the newborn. Newborns are vaccinated against hepatitis B and given hepatitis B immunoglobulin after birth. In daily life, you need to avoid contact with blood from people with hepatitis B. If you have sex with people with hepatitis B, it is important to wear a condom, get a timely injection of hepatitis B vaccine, and have regular rechecks for hepatitis B surface antibodies. Other people who are in close contact with people with hepatitis B are also recommended to get the hepatitis B vaccine, and to start using separate personal products. Although mosquitoes do not spread hepatitis B, but mosquitoes can spread malaria, epidemic encephalitis B, dengue fever and other diseases, daily life, pay attention to anti-mosquito mosquitoes, if you need to go to malaria and other diseases of the infected area, you need to consult with a physician, in advance of the vaccine and drug prevention.