Mice display altered immune system following spaceflight

Based on examinations of mice that had been on board the Bion-M1 biosatellite, new research demonstrates that the outer space environment impairs the production of B lymphocytes, the white blood cells responsible for antibody production. The study also shows that such adverse effects persist at least one week after returning to Earth.

from Top Technology News -- ScienceDaily https://www.sciencedaily.com/releases/2018/12/181206141115.htm