5 common misconceptions about the round scar on the upper arm

The truth:

The BCG vaccine was—and is—part of national immunization programs in many countries, regardless of income level. Millions of children from all walks of life have been vaccinated, especially in regions where tuberculosis was once widespread.

The scar says nothing about a person’s background, education, or social status. It reflects health policy, not personal circumstances.

Misconception No. 3: “If you don’t have a scar, you haven’t been vaccinated.”

Many people compare their arms to those of friends or relatives and assume that the presence or absence of a scar proves whether someone has been vaccinated.

The truth:

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