Japan Suspends 1.6 million Moderna Doses Days After Contamination Reports

Japan suspended the use of 1.63 million doses of Moderna Inc’s (MRNA.O) COVID-19 vaccine on Thursday, more than a week after the domestic distributor received reports of contaminants in some vials.

Both Japan and Moderna said that no safety or efficacy issues had been identified and that the suspension was just a precaution. But the move prompted several Japanese companies to cancel worker vaccinations planned for Thursday.

“Moderna confirms having been notified of cases of particulate matter being seen in drug product vials of its COVID-19 vaccine,” Moderna said in a statement.

“The company is investigating the reports and remains committed to working expeditiously with its partner, Takeda, and regulators to address this,” it added, referring to Japan’s Takeda Pharmaceutical (4502.T).

A Health Ministry official said Takeda first found out about the contaminated shots on Aug. 16 and reported the issue to the government on Wednesday. The delay was because Takeda needed time to gather information on which vials were affected and where they were in the country, the official said.

Moderna said the contamination could be due to a manufacturing issue in one of the production lines at its contract manufacturing site in Spain.

The suspension is a fresh setback for the firm, whose partners had production delays last month that disrupted supplies to countries, including South Korea.

It was not immediately clear whether the issue impacted supplies to other countries.

Both Moderna and Spain’s Rovi (ROVI.MC), which bottles or “fills and finishes” Moderna vaccines for markets other than the United States, did not immediately reply to Reuters’ requests for comment.

Japan’s defence ministry, which operates a mass vaccination site in Osaka, said shots from the lot in question, which contains 565,400 doses, had been used in the western prefecture between Aug. 6 and Aug. 20, but it did not say how many people were affected.

Moderna said that “out of an abundance of caution” it had put the lot in question and two adjacent lots on hold.

Takeda said it conducted an emergency examination after particulate matter was found in a lot of vaccine vials at an inoculation site.

Prime Minister Yoshihide Suga said on Thursday the country’s inoculation plan would be little affected by the issue. A day earlier, he said about 60% of the public will be fully vaccinated by end September and the country had enough vaccines to provide booster doses if such a decision is taken.

Chief cabinet secretary Katsunobu Kato said there had been no cases reported of health issues related to contaminated shots administrated.

Japan Airlines <9201.T> said it had cancelled some COVID-19 vaccinations for its employees on Thursday after receiving Moderna vaccines with particulate matter.

It rival ANA (9202.T) said about 4,700 shots of the halted Moderna lot had been used and it would stop all vaccination planned on Thursday.

Japan is battling is worst wave of infections, driven by the Delta variant, with new daily infections exceeding 25,000 for the first time this month. It has inoculated 54% of population with at least one dose and fully vaccinated 43%, according to a Reuters vaccine tracker.

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