Why are giving bcg to babies?

BCG (Bacillus Calmette-Guérin) vaccine is administered to babies primarily to protect them against tuberculosis (TB), particularly severe forms such as disseminated TB and TB meningitis. It is especially important in countries with a high prevalence of TB, as infants are at greater risk of severe disease. The vaccine stimulates the immune system to develop protection against the bacteria that cause TB. In many places, it is given shortly after birth to ensure early immunity.