Why Vaccines Work

(YouTube link)

What do scurvy and measles have in common? They are diseases we can defeat, as long as we take the proper steps to prevent them. This video from It’s OK To Be Smart goes over the basics of the immune system and how vaccines affect them. More of it is about the history of vaccines, and how it’s possible that we can sometimes forget how important medical breakthroughs are when we become used to better health. Talk to someone who is familiar with smallpox or polio, and the view changes. On another note, can you say “Citrus fruits cure scurvy” three times fast? -via Geeks Are Sexy

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There are a number of examples of prior knowledge or wisdom that has fallen into obscurity, to the detriment of new generations. Vaccination is one of them. Another is in the use of carved 'high water' stones in Japan, marking the extent of past Tsunami damage. The stones warned future generations not to build their homes below the level of the stones. Some communities followed these warnings, and were relatively safe from the 2011 Tsunami. Others did not, and suffered from loss of life and homes.
Similarly, the banking regulations of the New Deal were circumvented in recent times, contributing to the global financial crisis.
Some dangers occur on a timescale that causes us to ignore them until they hurt us again.
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