Encouraging news this week that the three shots, the two initial mrna pfizer or moderna shots, plus a booster, have long lasting protection against omicron and that there are signs that the antibodies and other parts of your immune system may be strong enough to fate off variants yet to come. quite likely that we'll have annual shots but a little too early to tell. >> let me get your thoughts, dr. ranney. on queen elizabeth's covid infection. she only has mild symptoms at the moment but she is 95, almost 96. how much risk does covid pose to someone her age despite being fully vaccinated? >> so...