The article, though, describes dates that do not overlap the games: > The report, carried out by private experts, suggested there may have been a "hazardous ev

The article, though, describes dates that do not overlap the games: > The report, carried out by private experts, suggested there may have been a "hazardous event", specifically at the institute's National Biosafety Laboratory, between October 6 and 11. Analysis of mobile phone data from around the institute also suggested roadblocks were in place between October 14 and 19. This doesn't rule out the possibility that the discrepancy comes from a drill or other preparation for the games. However, it does make this information worthy of deeper investigation.