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Explore the unexpected ways space travel affects the human immune system in this 11-minute educational video that reveals how the space environment can reactivate dormant viruses like those causing mono and chicken pox. Learn about the fascinating biological mechanisms behind viral reactivation in astronauts and discover how the unique conditions of space - from microgravity to radiation exposure - create the perfect storm for awakening pathogens that have been lying dormant in the human body for years. Delve into the scientific research uncovering these hidden health challenges of space exploration and understand the implications for long-duration missions to Mars and beyond.