A contaminant found in a batch of Moderna's COVID-19 vaccines delivered to Japan is believed to be a metallic particle, Japanese public broadcaster NHK reported, citing sources at the health ministry. Japan on Thursday (Aug 26) suspended the use of 1.63 million doses shipped to 863 vaccination centres nationwide, more than a week after the domestic distributor, Takeda Pharmaceutical, received reports of contaminants in some vials. NHK, in a report published late on Thursday, cited ministry sources as saying the particle reacted to magnets and was therefore suspected to be a metal. Moderna has described it as "particulate matter" that...