DR Ludris Shikwambane one of the medical doctors who were working on the 140 students who were repatriated from China, he says working with these students was a difficult task.

"We were fighting an enemy which is invisible so this really challenging. You have to know where exactly this enemy is.

Shikwambane was in conversation with Aldrin Sampear on Friday, on Thought Council, he says it was a difficult task that they had to deal with.