More good vaccine news
                                                                                Another vaccine candidate seeks emergency use authorization; Iran vows revenge after the killing of a top nuclear scientist.           Tonight's Sentences was written by Cameron Peters.                                                   TOP NEWS                          Promising vaccine candidates seek emergency use authorization                                                   Chandan Khanna/AFP via Getty Images                             On Monday, the biotechnology company Moderna submitted an emergency use authorization to the Food and Drug Administration for its Covid-19 vaccine, which recent data suggest is as much as 94 percent effective. [ NPR   / Richard Harris ]   According to data released by Moderna via press release from a 30,000-person clinical trial, the vaccine was also 100 percent effective in preventing "severe" Covid-19 infections. [ Science   / Jon Cohen ]   Moderna's...