(Jon Elswick | AP) Documents created by Pfizer for the meeting with the Food and Drug Administration advisory panel, as Pfizer seeks approval for emergency use of their COVID-19 vaccine, are seen on Thursday, Dec. 10, 2020. The meeting of outside advisers to the Food and Drug Administration represented the next-to-last hurdle before the expected start of the biggest vaccination campaign in U.S. history. Depending on how fast the FDA signs off on the panel's recommendation, shots could begin within days.