LONDON — The European Union’s drug regulatory agency said Thursday that the AstraZeneca vaccine doesn’t increase the overall incidence of blood clots and that the benefits of using it outweigh the possible risks, paving the way for European countries to resume dispensing the shots. France, Italy and Germany promptly announced they will start using the vaccine again on Friday. Spain, Portugal and the Netherlands said they will do so next week, though Spain said it might exclude certain groups to minimize any danger. More than a dozen nations around the world had suspended their use of the vaccine over the...