Space travel weakens our immune systems: Now scientists may know why

(University of California - San Francisco) Microgravity in space perturbs human physiology and is detrimental for astronaut health, a fact first realized during early Apollo missions when astronauts experienced inner ear disturbances, heart arrhythmia, low blood pressure, dehydration, and loss of calcium from their bones after their missions.
Source: EurekAlert! - Medicine and Health - Category: International Medicine & Public Health Source Type: news