Health workers conduct a spraying exercise at the National Heroes Stadium in Lusaka, capital of Zambian, on Jan. 9, 2018. The Zambian government said Monday that business in Lusaka, the country's capital, was slowly coming back to normal following measures put in place to contain the cholera outbreak. (Xinhua/Peng Lijun)

Zambian President Edgar Lungu (Front L) visits a cholera treatment center at the National Heroes Stadium in Lusaka, capital of Zambian, on Jan. 9, 2018. The Zambian government said Monday that business in Lusaka, the country's capital, was slowly coming back to normal following measures put in place to contain the cholera outbreak. (Xinhua/Peng Lijun)

Patients rest at a cholera treatment center established at the National Heroes Stadium in Lusaka, capital of Zambian, on Jan. 9, 2018. The Zambian government said Monday that business in Lusaka, the country's capital, was slowly coming back to normal following measures put in place to contain the cholera outbreak. (Xinhua/Peng Lijun)

A health worker takes care of a patient in a cholera treatment center established at the National Heroes Stadium in Lusaka, capital of Zambian, on Jan. 9, 2018. The Zambian government said Monday that business in Lusaka, the country's capital, was slowly coming back to normal following measures put in place to contain the cholera outbreak. (Xinhua/Peng Lijun)

A police officer stands guard outside the National Heroes Stadium where a cholera treatment center has been established in Lusaka, capital of Zambian, on Jan. 9, 2018. The Zambian government said Monday that business in Lusaka, the country's capital, was slowly coming back to normal following measures put in place to contain the cholera outbreak. (Xinhua/Peng Lijun)

Health workers work in a cholera treatment center established at the National Heroes Stadium in Lusaka, capital of Zambian, on Jan. 9, 2018. The Zambian government said Monday that business in Lusaka, the country's capital, was slowly coming back to normal following measures put in place to contain the cholera outbreak. (Xinhua/Peng Lijun)