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en.wikipedia.org/wiki/Effect_of_spaceflight_on_the_human_body

Humans venturing into the environment of space can have negative effects on the body. Significant adverse effects of long-term weightlessness include muscle atrophy and deterioration of the skeleton (spaceflight osteopenia). Other significant effects include a slowing of cardiovascular system functions, .... As these cells are central to the immune system, any damage weakens the ...

www.nasa.gov/content/study-reveals-immune-system-is-dazed-and-confused-during-spaceflight-u

Studies of how space flight affects the immune system may provide benefits ..... and behavioral changes in an individual as well as the propensity to develop disease. ... the cardiovascular system in astronauts living and working in low- Earth orbit. .... evolved so rapidly that even researchers don't agree on a single definition.

www.space.com/26903-astronaut-immune-systems-in-space.html

Aug 22, 2014 ... New research led by NASA shows that spaceflight confuses the immune system.

io9.gizmodo.com/why-do-our-immune-systems-falter-in-space-1668217291

Dec 8, 2014 ... The exact mechanism behind why our immune systems become less ... What is known, though, is that 1) Astronauts have better immunity on Earth than in space, and ... (and happily reversible) impacts to how well immune systems work. ... Doesn't our immune system rely heavily on bone marrow, and don't ...

www.smithsonianmag.com/smart-news/How-Space-Travel-Can-Damage-Our-Immune-Systems-180954164

Feb 6, 2015 ... NASA's been working on a program to send astronauts to visit an asteroid. ... from the International Space Station and found that their immune systems were, ... So don't go putting away that space suit quite yet—science has a ...

www.voanews.com/a/1647088.html

Apr 23, 2013 ... New research suggests even brief forays into space can weaken the immune systems of astronauts. During the final flight of the US space ...

phys.org/news/2017-04-effects-spaceflight-immune.html

Apr 5, 2017 ... The immune system is a complex weaving of biological structures and processes. ... European Space Agency astronaut Andre Kuiper, shown here in the ... the NASA Space Radiation Laboratory, as well as external investigators ... "On Earth, you usually don't go to the doctor until you get sick," said Crucian.

science.time.com/2012/10/22/dont-sneeze-in-space-when-astronauts-get-sick

Oct 22, 2012 ... Few people had a worse time in space than the crew of Apollo VII. ... Mermel began his work by surveying the health records of astronauts across the 30 ... and skin infections, as well as flu-like illnesses and viral gastroenteritis. ... the immune system can go on the fritz in space: wounds heal more slowly; ...

www.popsci.com/science/article/2009-11/mutant-bacteria-are-likely-threaten-future-space-travelers

Nov 5, 2009 ... What's worse, bacteria grow faster in space, for reasons that are not completely ... and antibiotics don't work as well in space, so higher concentrations are ... Apollo that astronauts' immune systems don't function well in space.

www.sciencedaily.com/releases/2013/04/130422132504.htm

Apr 22, 2013 ... "Weakening of the immune system associated with spaceflight is an area that ... The cells hung out in space for six days before the astronauts applied the LPS ... But, having conducted systems biology work since the late 1990s, the team was a well-oiled machine. ... Don't Count on Your Chickens Counting ...