Introduction. BCG, or bacille Calmette-Guerin, is a vaccine for tuberculosis (TB) disease. Many foreign-born persons have been BCG-vaccinated. BCG is used in many countries with a high prevalence of TB to prevent childhood tuberculous meningitis and miliary disease.CG, or bacille Calmette-Guerin, is a vaccine for tuberculosis (TB) disease. Many foreign-born persons have been BCG-vaccinated.
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Like cc, the abbreviation bcc comes originally from business letters typed on paper. It stands for blind carbon copy, and it is used to indicate people who will receive copies of the message in secret, or without the knowledge of the other recipients. In the sample header below, the email is going from me, Jane Mairs, to Alex Williams, the main recipient.