What BCG prevents
BCG is a type of vaccine that every baby needs to be vaccinated after birth. It is provided free of charge by the state. The vaccine plays an irreplaceable role in the growth and health of children. With the development of the national economy and the continuous improvement of medical standards, More and more parents are beginning to pay attention to the vaccine injection, so what diseases does BCG vaccination prevent? 
BCG (BCG Vaccine) is a live vaccine made from the attenuated suspension of Mycobacterium bovis, which has the effect of enhancing macrophage activity, strengthening the ability of macrophages to kill tumor cells, activating T lymphocytes, and enhancing the body''s cellular immunity.
BCG is mainly used to prevent the occurrence of tuberculosis. Tuberculosis is a chronic infectious disease caused by Mycobacterium tuberculosis infection. Tuberculosis bacteria may invade various organs in the body, but it mainly invades the lungs and is called pulmonary tuberculosis. Tuberculosis, also known as tuberculosis and "white plague", is an ancient infectious disease that has been caused by tuberculosis since humans.
Vaccination can make children develop special resistance to tuberculosis. At present, most countries in the world have listed BCG as one of the necessary vaccines for planned immunization. The main target of BCG vaccination is newborn infants and children. After vaccination, it can prevent the occurrence of childhood tuberculosis, especially those serious types of tuberculosis, such as tuberculous meningitis and disseminated tuberculosis.
After the baby is vaccinated with BCG, local redness, pustules, and eventually scabs may occur. Some children may have low fever, which is the normal reaction after BCG vaccination, and it will naturally return to normal after some time. After the scab on the inoculation site is peeled off, the skin will leave a stuck mark.
However, some babies have too severe reactions after vaccination, such as long-term drainage, wound infection, axillary lymph node enlargement, and ulceration, which may sometimes cause systemic reactions such as high fever. The child should be taken immediately to a specialist hospital for examination. Finally, parents and friends need to be reminded that after BCG vaccination, don’t forget to review on time.
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