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In page Azar Andami:

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From 1934 to 1967, a cholera-like disease (El Tor) spread in Iran and many other countries.[citation needed] El Tor is an acute diarrheal disease caused by the cholera bacterium. The symptoms of the disease originate from a toxin that is infected by germs in the small intestine of people. Therefore, germs are spread through human feces in the environment and contaminate water and food. In those circumstances, the only way to protect from infection with the toxin was through use of a cholera vaccine. At the time, the only vaccine preparation center in Iran was the Pasteur Institute in Iran. Andami developed an effective vaccine for El Tor which was produced by the Pasteur Institute for use in protecting Iranians and then converted to mass production for use in neighboring countries.[1]