When is the BCG vaccine typically administered?

The BCG (Bacillus Calmette-Guérin) vaccine is typically administered at birth because this timing is crucial for providing early protection against tuberculosis. Infants are particularly vulnerable to severe forms of the disease, and administering the vaccine soon after birth helps establish immunity before exposure to pathogens in the environment.

In many countries, the BCG vaccine is part of the routine immunization schedule, especially where tuberculosis is more prevalent. Administering the vaccine at birth maximizes its efficacy in preventing serious complications associated with tuberculosis in young children.

Other options involve ages that are too late for optimal effectiveness. For example, delaying the vaccine until 6 months or later risks a higher chance of exposure to tuberculosis before the child is immunized. Therefore, the preferred practice is to give the BCG vaccine right after birth to ensure the quickest possible protection for the infant.