if BCG vaccination leaves no scar at the end of 3 months of age,it means it may not have caused any reaction (hence immunity). Then it should be repeated at 3 months of age - why should we wait to repeat it at 7 years of age?
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if BCG vaccination leaves no scar at the end of 3 months of age,it means it may not have caused any reaction (hence immunity). Then it should be repeated at 3 months of age - why should we wait to repeat it at 7 years of age?
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