For many years superinfection was thought to occur mainly in high-risk populations.

Such studies should become more feasible with the increasing availability of endoscopy in high-risk populations.

"We're talking about a high-risk population similar to New York City," he said.

In high-risk populations, secondary prevention measures linked to screening programs have been instituted.

The curriculum addresses critical health issues, including those of high-risk, urban and underserved populations.

This effort will serve a high-risk population in a community setting.

Targeted mass treatment of high-risk populations has not been demonstrated to be effective and is not recommended.

The importance of screening for diabetes and kidney disease amongst high-risk populations is becoming very high.

The program also funds training, technical assistance and demonstration projects designed to slow the spread of the epidemic in high-risk populations.

India's high-risk population is not only enormous but also highly mobile and difficult to reach.