Prevention in the year 2002: some news, some issues.

As we move into the new century, we continue to focus on ways to prevent disease, promote health, and prolong life. We have made enormous strides in some arenas, including deaths from infectious diseases caused by mass immunization, improved sanitation, better nutrition, heart disease caused by risk factor modification, and some cancers caused by smoking cessation and screening for early detection. Although we have made progress, many challenges remain.