Pfizer said it would stop developing its midstage hepatitis C drug filibuvir, or PF-00868554. Potential competitors included new hepatitis C therapies from Gilead Sciences and AbbVie. "We continue to prioritize our [research and development] capital allocation to drive the next wave of innovative medicines and vaccines that bring benefit to patients and value to health care systems around the world," Pfizer's Victoria Davis said.

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