Mixing lab mice with pet store peers might boost research

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Laboratory mice are used in many areas of medical research, but their immune systems are more similar to the immature immune systems of newborn humans than adult immune systems.
When pet store mice were placed in the same cages as lab mice, the immune systems of the lab mice changed to more closely resemble adult human immune systems. The findings suggest that exposing lab mice to wild or pet store mice could improve the translation of mouse-based research to humans.