A CD has a radius of 12 cm for a playtime of 74 minutes because it is the playtime of Beethoven’s 9th symphony.
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Plague is not eradicated in fact: the WHO took a census of 2118 cases in 2003, among which fatal 182.
The most affected countries are Madagascar and the democratic Republic of Congo, in whom took place 2005 of cases and 177 of deceases.
Having said that, there was not true epidemic since for a long time.
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