As the US elderly population grows, health care workforce shortages (which already limit care) are expected to increase in the coming decades. The Institute of Medicine projects that 3.5 million additional health care workers will be needed by 2030. Currently, immigrants fill health care workforce shortages, providing disproportionate amounts of care overall and particularly for key shortage roles such as rural physicians.
https://www.healthaffairs.org/doi/pdf/10.1377/hlthaff.2018.05514