vaccine just a fourfield rise. very intriguing information, suggesting that mixing may be advantageous but we need a major study to say definitively. >> kaitlan collins should laid out this is a very difficult situation, the covid impact on the economy and on the country. here's one of the things that jumps out at me. if you go back to early in the administration when vaccines became widely available. everybody wanted vaccines and rushed out to get them in the spring it lulled out a little bit. 66 million americans have not received even one covid shot and only 231,000 americans initiated the vaccine yesterday. are you seeing any evidence on the ground that those who are hesitant or who are reluctant are beginning to come around, or as they hear things like cases are coming down and hospitalizations are coming down does that make you think oh, i told you so, i'm good? >> i'm not seeing a groundswell