Seventh cholera pandemic (1961–75)
The seventh cholera pandemic was the seventh major outbreak of cholera and occurred from the years 1961 to the 1970s and has continued (though much diminished) to the present. The outbreak began in Indonesia, called El Tor after the strain, and reached Bangladesh in 1963, India in 1964, and the USSR in 1966. From North Africa it spread into Italy by 1973. In the late 1970s, there were small outbreaks in Japan and in the South Pacific. There were also many reports of a cholera outbreak near Baku in 1972, but information about it was suppressed in the USSR.
In 1971, the number of reported cases reported worldwide was 155,000. In 1991, it reached 570,000.
The spread of the disease was helped by modern transportation and mass migrations. Mortality rates, however, dropped markedly as governments began modern curative and preventative measures. The usual mortality rate of 50% dropped to 10% by the 1980s and less than 3% by the 1990s.
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