Jama Editors' Summary: On Research In Medicine, Science, & Clinical Practice. For Physicians, Researchers, & Clinicians.

Platelet-Rich Plasma Injection for Knee Osteoarthritis, Bariatric Surgery for Nonalcoholic Steatohepatitis and Liver and Cardiac Outcomes, mRNA Vaccination and COVID-19 Hospitalizations, and more

Editor’s Summary by Linda Brubaker, MD, Associate Editor of JAMA, the Journal of the American Medical Association, for the November 23, 2021, issue.