So there are two different arguments here... Doctors who cannot get work and undocumented frontline medical workers.

For any physician in this country to be licensed in a state they must complete a residency program that varies in length. They then would be eligible to take board exams and become licensed. Even if they were physicians in their own country for years, they still must go backward and fulfill a residency program.

These people also must possess a visa to work in the country, both as a resident and as a physician. Many will apply for citizenship following their residency, a legal and desirable path IMHO. For a physician to be "undocumented" in this country would mean he was falsifying every piece of documentation he had, most likely his "medical degree" as well

"Front line medical workers" is an ill defined Xidenism... is that doctors, nurses, paramedics, EMT's,... the list is practically limitless

All this being said there is an issue with foreign medical graduates and the number of residency programs here in the US. US graduates are having a problem finding residency positions in the country, This issue is multifactorial.

I would guarantee the job situation is multifactorial as well and not just based on the number of foreign medical graduates...

Just wanted to drop this so everyone is more informed