 Consider more specifically what the opportunity-based account of justice and health care requires by way of preventive services. It requires (1) reducing the risk of disease and (2) seeking an equitable distribution of those risks. The first requirement is obvious. It is often more effective to prevent disease and disability than it is to cure them when they occur (or to compensate individuals for loss of function, where cure is not possible). Cost-effectiveness arguments will have some bearing on claims about the appropriate distribution of acute vs. preventive measures (Russell 1986). Since it is better in general to avoid the burdens of disease than to reduce them once they occur, many types of preventive measures will be given prominence in a system governed by the opportunity-based account.