You may have a little, rounded scar on your upper arm from the smallpox vaccination. Prior to the 1970s, many people had this smallpox immunization.

Live Vaccinia virus was used to stimulate an immune response that would protect humans from the lethal Variola virus that caused smallpox.

After receiving a shot, blisters form at the injection site. The blisters heal and produce a crust within a few weeks.

A round scar marks the final finish. A minute amount of the vaccine was applied each time the needle punctured the skin, and blisters formed. Because of this, the scars are rather visible.

The area where the shot was given increases slightly immediately and for the next 6 to 8 hours.

Following that, the edema subsides and the injection site seems normal. After 6 to 8 weeks, a bump like a mosquito bite appears.

It starts to expand and turn into a tumor. It gradually cracks open, begins to leak fluid, and becomes an ulcer.

As the wound heals, a scar forms. It takes between two and five weeks to complete. Ulceration and healing may occur twice or three times. It left a scar that will never go away.

Smallpox was eradicated in the vast majority of the Western world after the early 1970s. Unless they were traveling to a region where the virus was still active, they did not need to be inoculated.

A scar grows when it heals. The operation takes two to five weeks to complete. Ulcers can form and heal twice or three times. The scar that forms is permanent.

By the early 1970s, smallpox had largely vanished from the Western world. Unless they were traveling to a region where the virus was still active, they did not need to be inoculated.

The area where the shot was given increases slightly immediately and for the next 6 to 8 hours. Following that, the edema subsides and the injection site seems normal. After 6 to 8 weeks, a bump like a mosquito bite appears.

It starts to expand and turn into a tumor. It gradually cracks open, begins to leak fluid, and becomes an ulcer. As the wound heals, a scar forms. It takes between two and five weeks to complete. Ulceration and healing may occur twice or three times. It created a scar that will never heal.

Smallpox was eradicated in the majority of the Western world by the early 1970s. Unless traveling to an area where the virus was still active, people did not need to be immunized.

Smallpox vaccinations were completely halted in the 1980s, when it was determined that people had no longer been exposed to the Variola virus.

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