County vaccination data may mask school-level measles risk

Pockets of low vaccination rates in some schools help explain why measles outbreaks have been climbing in the U.S., even when county-level vaccination numbers—the data policymakers consult—appear high enough to provide community ...

Cannabis use linked to earlier onset of psychosis

Cannabis users develop psychosis an average of two-and-a-half years earlier than nonusers, a new meta-analysis by UNSW Sydney researchers shows. This earlier onset of psychosis becomes more pronounced with age, stretching ...

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