Lee, who just claimed third place in this evening's final, was in intensive care in the build-up to the Paralympics and has spoken of her difficulties to even compete.
"[Winning a medal] means everything," she said after the race. "It's been a massive struggle just to get here.
"Four months ago I was in intensive care so to finish off with a medal is amazing. Even during the week I've been really ill. I'm trying to stay well and to get to the blocks has been a battle."
"I had no idea [what was happening around me]. I just wanted to get to the wall; it was hard."
Lee's medal was ParalympicsGB's 117th of a successful Games to date.