Policy

Medical marijuana laws: New study looks at effects of dispensaries

How do you measure water crises? New scale provides actionable data

Yellow fever: Ending epidemics may require 95% vaccination coverage

Is the nation’s ‘student-loan crisis’ actually a crisis? Economist says no

Get moving: Study IDs best practices for encouraging physical activity

Depleted seamounts are recovering near Hawaii, new evidence suggests

Why do some parents oppose vaccinating kids against diseases?

Location of hospital can influence diabetes-related mortality, study says