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Changes in the immune system during and after spaceflight

G R Taylor1, I Konstantinova, G Sonnenfeld

  • 1NASA-Johnson Space Center, Houston, Texas, USA.

Advances in Space Biology and Medicine
|January 1, 1997
PubMed
Summary
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Spaceflight can weaken immune function in astronauts, increasing infection risk. Health stabilization programs and countermeasures help mitigate these immune system changes during space missions.

Area of Science:

  • Spaceflight immunology
  • Microbial ecology in space environments
  • Human physiology under extreme conditions

Background:

  • Spaceflight is known to impact human immune systems.
  • Immune function changes during spaceflight resemble stress responses.
  • Increased microorganisms in spacecraft pose infection risks.

Purpose of the Study:

  • To analyze immunological changes in astronauts before, during, and after spaceflight.
  • To investigate the relationship between immune function, stress, and microbial load in space.
  • To assess the effectiveness of countermeasures in preventing inflight infections.

Main Methods:

  • Immunological analyses of human crew members and animal models.
  • Monitoring of microbial populations within the space cabin environment.
Keywords:
NASA Center JSCNASA Discipline Number 00-00NASA Discipline Regulatory PhysiologyNASA Program FlightNon-NASA Center

Related Experiment Videos

  • Evaluation of preflight health stabilization programs and operational countermeasures.

    • Main Results:

    • Spaceflight consistently leads to a blunting of immune mechanisms.
    • Short-term flights show immune changes similar to acute stress; long-term flights resemble chronic stress.
    • A concurrent increase in cabin microorganisms elevates the probability of inflight infections.

    Conclusions:

    • Spaceflight-induced immune suppression increases the risk of infections.
    • Preflight health stabilization and countermeasures can reduce inflight infection probability.
    • Continued monitoring and countermeasures are crucial for spaceflight safety.