'who is going to pay for their medical treatment?"

We had discussed how Britain welcomes immigrants and asylum seekers whatever diseases, including AIDS, that they have.
We then give them the best treatment available free for life.
USA did not let AIDS sufferers in.

Obama announced that he would let in AIDS sufferers, and I asked if USA would treat them free for life, otherwise life would be short.
A good question.
No one knew the answer.