Pharmaceutical giant Johnson & Johnson said Saturday that it is being put in charge of a Baltimore manufacturing plant where 15 million doses of its COVID-19 vaccine were spoiled last month. The move came after workers at the facility of Emergent BioSolutions, a Maryland-based biotech company that has been manufacturing both the Johnson & Johnson and the AstraZeneca vaccines, accidentally mixed up ingredients from the two. While the AstraZeneca vaccine has yet to be authorized for use by the U.S. Food and Drug Administration (FDA), the Biden administration has entered loan deals to send 2.5 and 1.5 million U.S.-manufactured doses to Mexico and Canada, respectively. In a statement, Johnson & Johnson said it is “assuming all responsibility for the manufacture of the drug substance for its COVID-19 vaccine at the Emergent BioSolutions Inc. Bayview facilities.” Johnson & Johnson is “adding dedicated leaders for operations and quality, and significantly increasing the …