Professor Aiden McCormick:

The graph at figure 15.3 shows that 1,234 cases were reported in 2011 and that 874 were reported in 2012. That is when it changed from antibody and PCR positive patients to just PCR positive patients. We have made estimate in respect of the positive viraemic patients on the basis of data from the drug treatment centres and the hospitals. We think the figure is 20,000. However, the trouble is that there are unknowns involved and one will not know what is the exact figure until one gets to the end. As stated, we estimate that it is 20,000.