Immune systems can be weakened by space travel - what causes such an immune deificit? - study
The authors suggested that the change in gene expression of leukocytes under microgravity is triggered by a “fluid shift."
David Saint-Jacques and a record number of astronauts on board the International Space Station are collecting blood and breath samples for Canadian study MARROW. The experiment takes a closer look at the space-related changes that occur in blood and bone marrowUpdated: 
