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What is a biological disaster?

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What is a biological disaster?

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Looking back on history, we find that human beings have suffered from many biological disasters. Most of these have been infectious diseases such as cholera, plague, and small pox. Medical advances have brought vaccines and other specific cures enabling us to avoid damages from some of infectious diseases, yet many remain to be conquered. Highly pathogenic avian influenza, a disease in birds occurring repeatedly since ancient times, is now found worldwide. A World Health Organization (WHO) announced on February 15, 2007 that of 273 bird flu victims in 11 countries in Asia, the Middle East, and Africa, 166 have died. Since bird flu does not spread easily to human beings, the number of victims is limited. Once it mutates to a new strain of virus, however, it may be transmitted so easily that it could cause a large number of deaths. Many such cases have actually occurred in the past. The worst historically recorded ones involved Spanish flu, which started in 1918 during World War I among

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