 We shall conclude by considering how equal must our rights to health or health care be? Specifically, must everyone receive exactly the same kinds of health-care services and coverage, or is fairness in health care compatible with a ‘tiered’ system? Around the world, even countries that offer universal health insurance differ in their answers to this question. In Canada, for example, no supplementary insurance is permitted. Everyone is served solely by the national health-insurance schemes, though people who seek additional services or more rapid service may go elsewhere, as some Canadians do by crossing the border. In Britain, supplementary private insurance allows about 10 per cent of the population to gain quicker access to services for which there is extensive queuing in the public system. Basing a right to health care on an obligation to protect equality of opportunity is compatible with the sort of tiering the British have, but it does not require it, and it imposes some constraints on the kind of tiering allowed.