Short answers, pulled from the story.
Edward Jenner performed his first vaccine experiment in 1796. He injected pus from a milkmaid's cowpox blister into the arm of an eight-year-old boy named James Phipps to test immunity against smallpox.
The term vaccine was derived from the Latin word for cow, vacca. The phrase variolae vaccinae meaning smallpox of the cow was used by Edward Jenner to describe his discovery.
The World Health Organization declared smallpox eradicated in 1980. This achievement followed widespread vaccination programs and the dedication of health workers around the world.
Endemic polio is restricted to only parts of three countries: Afghanistan, Nigeria, and Pakistan. These nations face challenges in reaching all children due to cultural misunderstandings and disinformation.
Vaccine manufacturing plants may take between 4 and 6 years to construct. The full process of vaccine development takes between 10 and 15 years.
The World Health Organization characterized vaccine hesitancy as one of the top ten global health threats in 2019. This designation highlights the significant global health threat posed by vaccine hesitancy.