A plant in East Baltimore is making millions of doses of coronavirus vaccines. But they still have to be approved.

Covered head to toe in sterile garments, workers inside a modern manufacturing plant in East Baltimore have been making coronavirus vaccine for months — tens of millions of doses that, for now, are being stockpiled with no date set for distribution. None of the vaccines at the Emergent BioSolutions factory has yet been authorized for use. But among the pharmaceutical companies contracting with Emergent is Johnson & Johnson, which reported promising trial results Friday and is expected to submit data to federal regulators within a week for emergency authorization.