The FDA released an analysis of J&J’s COVID-19 vaccine Wednesday morning that supports its authorization for emergency use. On Friday, a panel of advisers to the agency will meet to evaluate the vaccine and make a recommendation about whether it should be given the OK. If the agency goes on to authorize the J&J vaccine, it would be the third, after those made by Pfizer-BioNTech and Moderna, to become available in the U.S. … Immunization with the J&J vaccine requires only one shot, unlike the two-shot dosing for the vaccines from Pfizer and Moderna. The J&J vaccine also doesn't require special refrigeration for shipment and storage.