Johnson & Johnson said on Wednesday it had found a problem with a batch of the drug substance for its COVID-19 vaccine being produced by Emergent Biosolutions, and said the batch did not advance to the final fill-and-finish stage.
J&J did not say how many vaccine doses the batch would have produced. The New York Times reported that about 15 million doses were ruined, without citing a source.
The Times said that workers had conflated ingredients for the J&J vaccine and a coronavirus vaccine developed by AstraZeneca Plc, which is produced at the same plant, several weeks ago.