News in Brief Measles Cases in the U.S. Reach a New Milestone More cases have been reported this year than in all of 1992, when the country had its last big outbreak. Francie Diep
News in Brief Washington State Is Considering Eliminating Non-Medical Vaccine Exemptions. Could It Prevent the Next Outbreak? The state would be the fourth to ban non-medical vaccine exemptions, a policy change lauded as one of the surest ways to avoid an outbreak. Emily Moon
Economics Optimism Seems to Strengthen Immune System A new study of stressed students finds a link between positive expectations and immunological health. Tom Jacobs