1799 - Laughing gas (nitrous oxide) discovered as an anaesthetic by Humphrey Davy.
1844 - Laughing gas used for the first time by Horace Wells.
1846 - Ether used for the first the first time in the USA.
1848 - Hannah Greener Died.
1853 - Queen Victoria uses chloroform to give birth to her 8th child.
1850 - Black Period infection bloodloss got worse.
1861 - Germ theory discovered by Louis Pasteur.
1865 - Carbolic spray found by Joseph Lister.
1878 - Chicken cholera vaccine made by Louis Pasteur.
1901 - For blood groups discovered by Karl Landenstenier.
1916 - A way of storing blood was developed.
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