It said that an oral vaccine campaign was due to begin shortly with 450,000 people targeted in the worst-affected suburbs of Harare.
About 500,000 doses were due to arrive in the country on Wednesday for Zimbabwe’s first oral vaccine campaign to combat the disease.
“A cumulative total of 6,428 suspected cases, 45 deaths, and 96 confirmed cases have been reported,” said a report by WHO and the health ministry.
The report said Harare city council was fixing broken sewers after blocked and damaged pipes left sewage flowing on open ground in all affected areas.
Safe water is being trucked to residents, and police have banned the sale of street food, arresting vendors to try to prevent the epidemic from spreading.
Cholera outbreaks occur frequently in Zimbabwe’s cities, where safe drinking water and sanitation facilities are scarce. In Harare, public gatherings have been banned and people are discouraged from shaking hands.
Zimbabwe suffered its worst cholera outbreak in 2008, when a total of 4,000 people died and at least 100,000 people fell ill.