On 18th century, Jenner figured that tho …

On 18th century, Jenner figured that those persons who caught cowpox was resistant to dangerous smallpox. He then tried small dosage of cowpox samples to health person, and correctly found that they were then resistant to smallpox. The methods was then named vaccination, after vacca (cow). Had Jenner been wrong, and his colleagues got poisoned, then vaccination would mean poisoning with viruses. Imagine: Hitler had cruelly vaccinated million of people in concentration camps.
But imagine if Hitler, after his failure as a painter, instead of being a despot, decided to mix his turpentine etc and started to invent best perfumes. You would hear some terms like Hitler’s new female fragrance no 5.