Something seriously wrong in the Western Cape

These graphs are basically just a visual indication of how pathetic public health services infrastructure is in other provinces. Gauteng, for instance, should be very close to that of the Western Cape.

There is maybe one additional factor at play in the Western Cape - namely that it is a much more integrated society: The coloureds probably serve as a vector carrying the virus between CT suburbia and the townships to an extent not present in other provinces.

I think it is sort of accepted in the world generally that the number of confirmed cases is at most less than about 10% of the total number of people infected.* In countries with less sophisticated means to identify new infections, and I'd consider South Africa as one of them, it could be many times that. The Western Cape probably comes closest to what they are capable of in Europe.

So, for SA's 7,000 confirmed cases as of the moment, you can easily add a zero, and I personally would not be averse towards adding another one.

*That's why the infection fatality rate, or, alternatively your probability of dying from it given that you have been infected, is less than a tenth of the case fatality rate - which is the numbers generally reported, e.g. for Italy where about 14% of people who were confirmed as having been infected died, the infection fatality rate is less than 14/10 = 1.4%. I suspect that in truth it is probably less than even half of that, because Italy was so swamped with cases that I'm sure that their ability to identify new infections was severely compromised, so you shouldn't divide by 10, but maybe even by 20. Of course, this probability is not evenly distributed throughout the population but is age- and general-health dependent.