Moderna Inc (MRNA.O) said on Wednesday it has withheld the supply of about 1.63 million doses of its COVID-19 vaccine in Japan after a report of contamination of vials with particulate matter, which it suspects involves a production line in Spain, Reuters reports.
“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.
It said the contamination could be due to a manufacturing issue in one of the production lines at its contract manufacturing site in Spain.
It was not immediately clear whether the issue impacted supplies to other countries.