IDNLearn.com connects you with experts who provide accurate and reliable answers. Ask anything and get well-informed, reliable answers from our knowledgeable community members.
Answer:
The small pox vaccine, which was first introduced by Edward Jenner in the year 1796, was the very first successful vaccine to be made. He figured out that milkmaids who already had got cowpox did not get smallpox and found that inoculated vaccinia fought inoculated variola virus.
Explanation: