(Bloomberg) -- WW International Inc. plunged the most in more than three months Thursday after Eli Lilly and Co. launched a digital health-care platform to deliver weight-loss drugs, posing a threat to a key area of growth for the wellness company.Most Read from BloombergConfidential Jeffrey Epstein Documents Unsealed by New York CourtIslamic State Claims Responsibility for Deadly Iran BlastsDeadly Iran Blasts and Red Sea Warnings Fan Mideast TensionsJust a Billion Doesn't Cut It on This Exclusi