BCG vaccine is a vaccination used to prevent tuberculosis in children, and is a mandatory vaccine that is required by the state, i.e. mandatory immunization. BCG vaccination is mainly given to newborn babies and children, and it is good for the healthy growth of children. BCG vaccination is called the “first shot at birth”. After 2 weeks of BCG vaccination, the baby will develop redness and swelling, followed by septicemia and rupture. The BCG vaccination will gradually scab over 8-12 weeks and eventually leave a scar. Each baby’s body type is different, and the time of local reaction to BCG vaccination, the symptoms and the speed of healing are also different. Some babies will react only 2 months after vaccination, some have a mild reaction with a slight redness of the skin that heals quickly, while others have obvious symptoms with large red and swollen pus pockets that look scary. It is important to note that pus formation and rupture are normal reactions to BCG vaccine and usually do not require special treatment. However, now that it is summer, make sure your baby pays attention to keeping the skin clean to prevent infection, wear loose clothing, and wait for the scabs to fall off on their own. Why are newborns given BCG vaccine? BCG vaccine is a live, attenuated, weakly virulent vaccine. When newborns receive BCG vaccine, they will have a mild infection in their body, which in turn will create the ability to resist tuberculosis, and there is no risk of morbidity, which can reduce the occurrence of tuberculosis. Note: If a newborn is not vaccinated in time, parents must usually go to the local TB control facility to get a catch-up vaccination before the baby reaches the age of 1 year. What are the precautions to be taken after BCG vaccination? 1.If the child is healthy, the vaccination will basically require 30 minutes of observation at the vaccination site, and if there is no abnormal reaction, you can leave. 2.Small-scale redness and pressure pain may appear at the site of the injection, which will generally get better on its own after 24 hours. If there is a fever and other symptoms, it is not a big problem as long as it does not exceed 38.5℃. Do not bathe your baby for two days as much as possible, and keep the site of the injection dry and clean. 3.If the abscess or ulcer at the inoculation site does not heal for more than 6 months, you should check again to see if the baby’s axillary lymph nodes are obviously enlarged. It is recommended to take the baby to a tuberculosis clinic for examination, and if it is indeed a pustule, the pus needs to be drawn out with a sterile syringe, and it can generally be healed in 2-3 times. 4. After BCG vaccination, the vaccination personnel will make records on the newborn’s vaccination card. If there is no record on the vaccination card, you should promptly ask the hospital where the newborn was born for the reason so that when vaccination is available, it can be done in a timely manner.