Future shipments of Johnson & Johnson’s coronavirus vaccine from a Baltimore plant are on hold after about 15 million doses were ruined in a mixup.

Wednesday, March 31, 2021 5:59 PM EST

Workers at a Baltimore plant manufacturing two coronavirus vaccines accidentally conflated the vaccines’ ingredients several weeks ago, ruining about 15 million doses of Johnson & Johnson’s vaccine and forcing regulators to delay authorization of the plant’s production lines.

The plant is run by Emergent BioSolutions, a manufacturing partner to both Johnson & Johnson and AstraZeneca. Federal officials attributed the mistake to human error.
The New York Times