The ongoing seventh cholera pandemic began in 1961 on the Indonesian island of Celebes. It was caused by the El Tor biotype of Vibrio cholerae, which spread through Asia during the 1960s, then to the Middle East and Africa in the following decade. It later reached Latin America. The El Tor biotype can survive for long periods in water, and many infected individuals have mild symptoms or no symptoms. Because many individuals feel well enough to travel or continue daily routines, the bacterium continues to spread easily.
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