Newborn infants who are in good health and weigh more than 2.5 kg should be routinely vaccinated with two types of vaccines: 1) BCG vaccine, which is a live attenuated vaccine made from a bovine strain of Mycobacterium tuberculosis and provides a certain level of immunity against tuberculosis. 2) Hepatitis B vaccine, which is a purified hepatitis B surface antigen, stimulates the immune system to produce protective antibodies after vaccination to prevent hepatitis B infection. The vaccine stimulates the immune system to produce protective antibodies for the purpose of preventing hepatitis B infection. These two vaccines can be administered simultaneously, but they should be administered on both arms separately, usually intracutaneous BCG injection in the upper deltoid muscle of the left upper arm, and intracutaneous hepatitis B vaccine in the deltoid muscle of the right upper arm.