Cholera
Cholera is an efficient historical killer of people, but it is
a well-understood killer. The key to prevention of the disease
is simple: clean water. Given clean water supplies and
good public hygiene, cholera is virtually never a problem.
Because of this cholera was one of the first diseases
to be "conquered".
Over the past few years, however, the conquered bacterium has
returned. In India and Africa, mortality from cholera is
increasing rapidly. And the disease has even spread to previously
unaffected areas. In 1991 cholera hit Peru and then spread down
the west coast of South America. Eventually the disease even made
its way to North America. The New World, once a cholera-free zone,
now appears to be permanently afflicted.
What is causing this resurgence? As is usually the case, the
answer is complex: failing health systems, pollution of previously
clean water supplies, wars and population dislocations, changing
weather patterns. Even globalization contributes - the cholera bacterium
that hit Peru may have been imported via a ship from India.
Link: Cholera Returns
Link: Cholera History, India & Europe
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