File: Nursing practitioners do a swab that will be submitted to labs for analysis.
Two patients are currently in ICU in private hospitals.
Three doctors -- one in Limpopo, Mpumalanga and the Free State -- have tested positive.
Mkhize said there are no fatalities and that all patients are improving.
He said the largest number of scattered cases are in Johannesburg. In the Western Cape, scattered cases are around Cape Town.
Mkhize says the health department will increase testing facilities, but there will be strict criteria as to who can get tested.
"We test those with a history of symptoms and a history of contact and travel," he said.
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