we often turned to propublica reporter caroline chen throughout this crisis, and, on this weekend lastr, she and i were talking about testing. >> i think, even as of this week, we have continued to hear americans say, "we want to be tested, we can't get tested," and to hear doctors saying, "we want to get these patients tested, and we can't." and that's tremendously frustrating and anxiety provoking. >> sreenivasan: caroline, a year ago, we were in a fancy studio, i used to wear ties, and we were talking about how this new coronavirus was going to impact us, and, at the time, you were saying it's changing by the hour. >> yeah. and truly, in the past year, we have learned so much as scientists, as a nation. you know, when we have a new virus, you know, we have to learn and adapt with the science. and i think that there have been ways in which we have done that well as a nati, and there have been ways at which we have not, you know, communicated the changing science well to the public and realized that we were really just not as prepared as we hoped we could be. >> sreenivasan: you know,