By Dr. Richard Liebowitz

Covid-19 has revealed once again how short our nation is of doctors.

Early in the pandemic, several governors called on retired physicians to return to the workforce. Medical schools allowed students to graduate ahead of schedule and begin working and training in hospitals. States loosened licensing restrictions to allow physicians from other locales to practice within their borders.

These temporary measures helped battle the pandemic in the short term. But they're not a sustainable way to address the U.S. doctor shortage.

Simply put, America needs more doctors. Int...