The widespread use of this vaccine was discontinued between 1972 and 1980, when the World Health Organization (WHO) officially declared smallpox eradicated. Thanks to that historic decision, the virus that caused the disease has completely disappeared from nature. Since then, the vaccine has only been used in very specific cases, such as for certain laboratory workers or military personnel who might be exposed to manipulated versions of the virus.
Smallpox Scar vs. BCG Scar
One common question is whether this scar can be confused with the mark left by the BCG vaccine, which is used against tuberculosis. Although both leave marks on the skin, there are clear differences: the BCG scar is usually more raised and is sometimes located on the right arm, while the smallpox scar is deeper, circular, and generally found on the left arm.
