The longer astronauts spend in space, the more likely they are to have viruses like herpes, chickenpox and shingles reactivate, according to new NASA research
. The reason may be the same for viral reactivation on Earth: stress.
Samples of blood, urine and saliva were collected from astronauts before, during and after short space shuttle flights and long-term International Space Station missions. Herpes viruses reactivated in more than half of the astronauts. The study published last week in the journal Frontiers in Microbiology.
"The next question would be, how do we mitigate these effects? How do we prevent the immune system from declining during space travel?" Simpson said."In order to do that, you have to first figure out what's causing the decline: Is it stress? Is it microgravity? Is it radiation? Is it a plethora of things? When we figure that out, we can try to find ways to directly target those factors and mitigate them.
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