When it comes to measuring the progress of a disease three different methods of measurement are normally used: incidence, prevalence and mortality. In the case of TB these are invariably pegged against a consistent number of population – i.e. ‘per 100,000’ – so when we encounter such estimates we can understand them in terms of ‘how many per 100,000’. Mortality rates are fairly obvious: it suggests how many individuals within an average 100,000 individuals might have been est
Well the WHO’s Global Report has been out for over a week, and it turned out to contain pretty much the sort of numbers we were anticipating. Unfortunately we’re still struggling a little to make coherent sense out of all of them. While we wait for their expert response to some specific questions we’ve asked relating to what appear to be serious anomalies regarding some of the numbers relating specifically to South Africa, we’ve decided to share some of our other confusions.