Hawkins said in chapter 912 or 910, Luffy and Zoro hav a combined chance of living as 18% by the end of this month.
I think that referenced Hakai for Zoro and how he's going downstairs now.
And for Luffy it will take effect soon since he is confidently charging Kaido Hybrid alone.
Zoro is for sure coming back up after restoring health because Luffy won't have the energy to finish Kaido.
I'm also saddened that Luffy isn't 1v1-ing Big Mom. Wanted him to beat the Goofy outta that fat Cannibal.