Chamisa’s critics accuse him of trying to copy Kenyan opposition leader Raila Odinga, who took a symbolic presidential oath in a challenge to President Uhuru Kenyatta in January.
“The anniversary rally will go ahead at a later date to be advised and the venue will remain the same, Gwanzura stadium,” the MDC said.
Nearly 4,000 people have been infected with cholera, which has been declared a health emergency in Harare.
Zimbabwe’s new Finance Minister Mthuli Ncube has set up an emergency crowd fund to raise money to fight the outbreak.
The latest cholera outbreak hit the city of 1.5 million people after burst sewers in the Budiriro and Glenview suburbs contaminated water in boreholes used by residents. Harare’s population draws water from one lake originally meant for 300,000 people, while a new dam first mooted in the 1990s is still to be constructed due to funding problems.
New Health Minister Obadiah Moyo blamed the opposition-controlled city government.