The U.S. Food and Drug Administration (FDA) signed off on updated versions of coronavirus vaccine that target a more recent variant of the virus that was behind the summer surge of COVID-19 cases. The new shots - one from Moderna, another from Pfizer/BioNTech and a third from Novovax - are making their way to pharmacies and doctors' offices across the country. These updated vaccines meet FDA's rigorous, scientific standards for safety, effectiveness and manufacturing quality. Here are Things to Know About the New COVID Vaccines (PDF)
