Demand for these health care jobs is increasing most in Montana

Scrubs could become an essential part of the wardrobe for millions more Americans as health care jobs grow across the country.

The aging U.S. population is rapidly increasing demand for many jobs in the health sector, which has become the fastest-growing part of the national economy. Although many medical jobs require advanced degrees—physicians, nurses, surgeons, etc.—the role growing fastest across most states is generally accessible to anyone with a high school diploma.

The job? Home health and personal care aides. The U.S...