Smallpox is a virus that causes a rash that then turns into painful blisters. The last known case of smallpox was in 1977. smallpox was eradicated when a vaccine was developed against it.
What is smallpox?
The variola virus (smallpox virus) first appeared thousands of years ago and began causing illness and death in human communities, with smallpox epidemics occurring on a regular basis.
How was smallpox eradicated by the vaccine?
- The first successful vaccination was Edward Jenner's smallpox vaccine, which was launched in 1796.
- He discovered that milkmaids who had previously contracted cowpox were immune to smallpox, and that injected vaccinia protected against inoculated variola virus.
- Jenner scratched fluid from a cowpox blister into the skin of an eight-year-old boy named James Phipps.
- James had a single blister on the location, but he recovered quickly.
- Jenner inoculated the boy with smallpox particles again on July 1, but no sickness developed. The vaccine was effective.
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