entirely separate from the population the entire time. anyone attending the games unvaccinated, they'll have to quarantine for 21 days upon arrival. and get this -- for the local chinese staff and volunteers, after the games, they have to quarantine for 21 days before going back to their homes to see their families in china. this decision comes after beijing detected its first case of omicron, and in china, even one case is one too many. we're seeing several cities across china back in war-time mode with snap lockdowns, mass testing, contact tracing and quarantine. all of that in response to sometimes just one or a handful of cases. now, that strategy has been effective this china so far, but there are concerns they won't be as effective with the omicron variant given, one, how transmissible it is, and two, reports that chinese vaccines are not as effective against this variant. >> incredibly concerning. thank you for the reporting. developing right now, israel just announced the results of a new study on the effectiveness