"This was used in a synthesizing device to produce vaccine."
— Item description
Medium Base is a special item found in Resident Evil: The Umbrella Chronicles.
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- Waples, Damien (2007). Chastain, Rebecca. ed. Resident Evil: The Umbrella Chronicles Prima Official Game Guide. Roseville: Prima.
- ?, ed (2007) (in Japanese). BIOHAZARD The Umbrella Chronicles Official Guidebook. Famitsu. ISBN 978-4-7577-3954-3.
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