My son in 6 months old.The BCG vaccine given after birth scar dint come is it normal or not? or else another dose has to be given

A. Mam actually a lot of parents have this confusion about the car but I must clarify it it does not happen these days it used to happen previously when we used to get vaccinated for the vaccine but as of now there is no such scar that you can expect the vaccination and start to work as soon as it is given