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Digital health companies are funneling sensitive data that patients have shared with them to Facebook to help target advertisements, according to a new study from research group the Light Collective. In some cases this sharing is running afoul of the companies’ own privacy policies and raising concerns about HIPAA violations. The peer-reviewed study, published Monday in Patterns, a data science journal, examines the way data from individuals’ health-related activity online is tracked across websites or platforms and then used for advertising purposes on Facebook. Read more at the link in the bio.