The twists and turns of the American health system can sometimes leave people lost, confused and looking for answers. We’ve created a new video series — “Explained by KHN” — in which our correspondents and editors answer common health care and health policy questions. 

As promising news about the development, efficacy and distribution of covid-19 vaccines spread across the United States, questions about the shots were even more viral. In this edition of “Explained by KHN” we will answer common consumer questions about the covid vaccines.