Has any astronaut had a sample of their blood taken while in space? This may be as part of a scientific experiment, or for their own health. If yes, was the sample analyzed while in space, or was it returned to Earth for analysis?
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$\begingroup$ Do you think the current answer is sufficient? $\endgroup$– uhohAug 3, 2021 at 3:38
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Yes, here's a video of an astronaut drawing blood in space and generally they freeze the samples and send them back to Earth for analyses, but there is also a Bio-Analyzer on the ISS so they don't have to return samples. Astronauts have to take blood, urine and saliva tests which are normally sent back to Earth soon before the astronauts themselves return, for freshness...
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1$\begingroup$ A very quick google yielded those answers, showing little research.. $\endgroup$ May 3, 2021 at 11:06
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1$\begingroup$ Just read a meta post, my understanding is that I should have just answered the question and not commented the answer, my bad. I will remove my comment (and edit your answer accordingly) $\endgroup$ May 3, 2021 at 11:49