Gimme Yo Feedback

[Spy_Guy]

Perhaps at that point, they could take a blood sample and run it through some kind of machine to get a better analysis?

Yes... a machine called.... A BEAKER!!!

if you draw blood from someone and stick it into a beaker you can see the chems they had inside them

I'm always amused by spacemen drawing someone's blood, then looking at it to find out what's ailing them / another spaceman.