Japan: 1.6m Moderna Doses Pulled After Officials Discover Vials Contained 'Foreign Matter' That 'Reacts to Magnets'

About 1.6 million doses of Moderna's coronavirus vaccine have been taken out of use in Japan because of contamination reported in some vials, the Ministry of Health, Labor and Welfare said early Thursday.

Several vaccination centers have reported that vaccine vials contained foreign matter, according to an announcement from the ministry, which added it will seek to minimize the impact of the withdrawal on the country's inoculation program.

The ministry said later in the day that the substance that had been mixed in may have been metal. "It's a substance that reacts to magnets," a ministry official said. "It could be metal."

[...] Nasdaq-listed Moderna confirmed receiving "several complaints of particulate matter" in vaccine vials distributed in Japan but said it had found "no safety or efficacy issues" related to these reports.

"The company is investigating the reports and remains committed to working transparently and expeditiously with its partner, Takeda, and regulators to address any potential concerns," a Moderna spokesperson told Nikkei, saying the drugmaker believed a "manufacturing issue" at a plant in Spain was the cause.