Public Health Wales continues to do its surveillance work of the disease across Wales. I think that Merthyr was another part of Wales that showed as having a very low incidence at this point in the surveillance effort. There are very sophisticated ways, Llywydd—well beyond my ability to explain—in which modelers are able to tell you the prevalence of the disease in a community from the number of people who are presenting for intensive care. There will be ratios that they can deduce from the evidence that they already have. They'll say, 'This number of people are presenting in intensive care. It means the prevalence in the community at community level is of this sort.' And all of that is going on. The change in the testing regime does not mean that there is no intelligence about what is happening at community level. But as I say, there is daily discussion as to whether or not that needs to be done differently or strengthened in other ways.

And I entirely understand the points that Siân Gwenllian made at the end about the family context in which clinical workers operate, and for that to be factored into the testing regime. There will be a circular—that I hope will be available today—that will go out to the NHS through the chief medial officer's office providing detail of how that regime is to be conducted.