Purification- wrote...
NuclearBuddha wrote...
Daginu wrote...
what makes them any more fragile than humans they didnt get imunno difficeny until they had to leave because of the geth...
Tali says their immune system was never as strong as the other races, though. But yes, it only really went bad during their exile.
Infection was a huge cause of death back in those days. I suspect (and, this is just a theory, since we don't have any actual information) that it was worse for the quarians.
To be honest i really think if Quarian medicians get to research hard on that part of medicine they would upgrade they immune system. They created the Geth, that means that their technollogy inteligence is highly superior than we think. 
I was under the impression that the problem with the quarian immune systems weakening was more about resources. They could've kept their antibodies up to pre Morning War levels if they had the resources, but its just not an option on space ships.
Back on solid ground, they will be able to develop their immune systems back to pre Morning War levels eventually, which unless I'm mistaken, means they wouldn't even need a suit traveling the galaxy, let alone on Rannoch.
As far as improving it more, that was the point of the suits really. Those things are a complex web of engineering that we probably couldn't hope to understand.