TB is a dangerous infection that primarily affects the lungs but can also cause damage to the bones, joints, kidneys, brain (meningitis), and other organs. A reduced strain of tuberculosis bacteria is used to create the BCG vaccination. The vaccine stimulates the immune response to fight against infection but will not actually cause TB. The infant will often be given the BCG vaccine at around 28 days old. The injection site is typically sore initially and leaves minor scars. To know more about BCG vaccination, consult Dr. Promilla Butani, the best Pediatrician Specialist in Delhi, at Dr. Promilla Butani’s Pediatrics Practice.