Moderna Inc has said that it has signed an agreement with Spain's Laboratorios Farmacéuticos Rovi SA to scale up the manufacturing and production of its potential COVID-19 vaccine to supply markets outside the United States.ROVI will procure a new production line and equipment for vial filling and packaging, automatic visual inspection and labeling, and hire more staff to support the production of millions of doses of Moderna's vaccine candidate, the companies said.Moderna's vaccine was among the first to be tested in humans in the United States and was found to produce protective antibodies in a small group of healthy volunteers in May.