Syringe length8 hundredths m
860 millionthsStatue of Liberty heights
5.2 thousandthsGarden hose lengths
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The needle that made deadly diseases a memory/Inventions & Discoveries
Edward Jenner performed the first vaccination in 1796, using material from a cowpox lesion to immunize against smallpox. The modern hypodermic syringe was developed by Alexander Wood and Charles Pravaz in the 1850s. A standard vaccination syringe holds about 0.5 to 1 mL, is approximately 8 cm long, and uses a needle with a bore of about 0.5 mm. Vaccination has since prevented an estimated 154 million deaths over the past 50 years.
0.5 mL
Jenner, 1796