The European Union began a mass vaccination campaign on Sunday to eventually inoculate some 450 million people in 27 member-states against COVID-19. EU leaders have negotiated contracts for more than 2 billion vaccine doses from various suppliers. The first 200 million doses are of the vaccine from Pfizer and BioNTech, which was co-developed by a husband-and-wife team in Mainz, Germany. … The EU hopes to vaccinate residents of all 27 member-states by the end of next year. Brussels has also secured doses of the vaccine for non-EU countries — including Iceland and Norway.