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NEW YORK (AP) — Subway says it plans to switch to meat raised without antibiotics over the next several years after a coalition of advocacy groups planned to deliver petitions to the company’s headquarters Thursday calling for the change.

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The sandwich chain had already said this summer that it would switch to chicken raised without antibiotics important to human medicine by next year.

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Now, it says it will serve chicken that receive no antibiotics starting in March. It will also make the change to turkey starting sometime next year, with a transition expected to be complete within two to three years.

Pork and beef raised without antibiotics will follow within six years after that, or by 2025, the company said Tuesday.

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