Anybody know about the BCG vaccine?

Bcg vaccine. Bcg vaccine is a vaccine for tuberculosis.It is not used in us, but it is used in many countries where there is high prevalence of tb.To prevent childhood tb, TB meningitis and miliary tuberculosis.It should only be used in persons and children who have negative tuberculin test and are continually exposed and can not be separeted from adults who are not adequately treated, or have resistance strain.