Daily Health Tips: Should I Be Worried If I Don’t Have A BCG Scar Though I Took The Vaccine?

Q: Hello Dr, is there any problem if one was given a BCG vaccine and the scar is not there. I am 25 yrs old.

A: The full meaning of BCG is Bacille Calmette-Guerin, named after scientists, Drs Calmette and Guerin who developed the vaccines. It was used for the first time in human beings in 1921. This is a freeze-dried live but weakened strain of Mycobacterium Bovis (very similar to the bacteria that cause tuberculosis), a bacterium found in cattles which can cause tuberculosis in man. This vaccine is part of the compulsory immunization schedule in countries with a high incidence of tuberculosis. It provides protection over a a range of 10-20 years and so is not particularly useful in adults…sorry 😉

This vaccine usually causes a local reaction in most, but not all people. This local reaction gives rise to the ‘infamous’ scar 😀 but does not really act as a marker for protection against tuberculosis. So, if you don’t have a BCG scar, it does not mean that you did not respond to the vaccine and there’s certainly no need for you to take another dose of the vaccine.

Have a good night, y’all 😀

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4 Responses to Daily Health Tips: Should I Be Worried If I Don’t Have A BCG Scar Though I Took The Vaccine?

  1. Pingback: Daily Health Tips: World Tuberculosis Day. | chatwithketch

  2. bunmiyemitan says:

    Hello Doc,

    Good Evening and thanks for educating us so far.

    If I may ask,what causes increase in vaginal discharge and are the effects both good and bad.

    What can be done to correct it.

    Thanks for your prompt response.

    Good Night.


  3. Pingback: Daily Health Tips: Unite To End Tb! | chatwithketch

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