I’m not too concerned. They can get medicine to him, so as long as that works and his condition improves enough, they can get him out.
If the medicine doesn’t work and whatever issues he’s facing deteriorates further, then there’s a real problem.
Of course the real nightmare is if he’s developed a chronic health issue, he’ll have to get treated for the rest of his life, here in the States. I’d wish that fate on no one.