The Truth Behind The Small Scar On Upper Left Arm. Here’s What It Really Means

Have you ever wondered why some people have a tiny round scar on their upper left arm?

This is commonly known for people who were vaccinated for smallpox.

Before 1970s, this smallpox vaccine was common.

It used live Vaccinia virus in order to trigger an immune response that would protect people against the dangerous Variola virus that caused smallpox.

Scarring

After the vaccination, blisters forms at the vaccination area, crusted over, and healed in a couple of weeks.

At the end it leaves a round scar.