By secondary infections, they are talking about pneumonia. Not a recurrence of symptoms. In fact, the article points out that 61 of these cases did have sympt

By secondary infections, they are talking about pneumonia. Not a recurrence of symptoms. In fact, the article points out that 61 of these cases did have symptoms. What exactly those symptoms were, I'd like to know. Also, I am wondering about the progression of the disease the second time around.