From the publisher:

This mini expansion introduces two new types of BIOTIX microbes, Adaptive and Hyper-reactive, with new abilities to enhance your game. The Incubator cards and rules add a new mechanic to the game, allowing players to pass a BIOTIX at a time of their choosing. Finally, Eureka cards replace the pen and paper notations of the end game rules with a more elegant set of materials. Everything is included in a miniature bag.