The skin of what type of animal is used to treat burns?
Fish skin, usually from Atlantic cod or Nile tilapia, has anti-inflammatory and anti-bacterial properties that support healing of some wounds including burns and diabetic foot ulcers.
When were surgical masks first used?
Surgical masks were first used in the late 1890s.
Reference: Encyclopaedia Britannica
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Who first showed that handwashing saves lives?
In 1847, Hungarian doctor Ignaz Semmelweis showed that handwashing reduced deaths among new mothers, but many doctors rejected his idea.
What was Ether Day?
On October 16, 1846, dentist William Morton gave the first public demonstration of surgery using ether anesthesia at Massachusetts General Hospital, a date now called "Ether Day."