You can take those statistics with a pinch of salt. Stats in SA are very unreliable anyway, more so when being used to push an agenda. It is, of course a big problem but not as big as they would have you believe.
As a foster parent to eight newborns in South Africa in the past four years, you would expect two or three to be positive based on those numbers. Particularly as they were all abandoned at birth by their mothers, and therefore higher risk.
In reality only one came from a mother known to be +ve, and we had him on ARV's until two clear tests. We tested the others as soon as they arrived with us. So none out of eight.