According to Moderna, there has been no safety concerns reported in individuals who received the COVID-19 vaccine from this lot. Additionally, it maintained that it does not believe this poses a risk to other vials in the lot and does not think it affects the benefit/risk aspect of the jab. Rovi joined the list of firms supporting the production of Moderna's vaccine mRNA-1273 in July 2020 by providing fill-finish and packaging services for the company from its facility in Madrid, Spain. In August 2021, Japan put 1.6 million doses of the Moderna vaccine on hold after "foreign materials" were discovered in approximately 565,000 vials. Rovi and Moderna conducted an investigation after particulate matter was identified in vials of the vaccine distributed in Japan and concluded that it was most probable that friction between two pieces of metal installed in the stoppering module of the production line due to an incorrect set-up caused this issue.