I’ve been thinking about this a lot. And one of the reasons I think Korra isn’t going to bounce back from this, is because of how Suyin saved her.
It was a metal based poison. Suyin would have been more concerned with getting all the metal out of Korra’s body. Metal bending is very new, so there’s a HUGE chance that Suyin removed most of Korra’s Iron stores in the process.
Well, the body used Iron to make hemoglobin, the substance in red blood cells that carries oxygen throughout the body.
2 weeks after the attack, Korra is showing signs of Iron Deficiency. She’s physically weak, has fatigue, apathy toward others, trouble focusing and paler skin.
How long could it take for Korra to recover?
If Korra was to start taking iron pills it could take up to 6 months appoxly before she’s back to normal. (That is, of course, provided that in this world they are even aware of Iron Deficiency, which they probably aren’t.) So it could take a very long time for her to recover the iron she lost.
So, not only did the poison mess her body up but now, Korra doesn’t have enough iron to properly HEAL and recover from the attack. And if she has Iron Deficiency, she’ll be more open to infections and illness which will also set her back.
If she does have this… It’s gonna be a long road to travel.
Get better soon Korra. <3