joined now by dr eric finkel during and at the deni ologist and health economist at the harvard chan school of public health thank you for joining us doctor is this test for real it almost sounds too good to be true. it's definitely real and these are the technology has a bolt a lot in the last few years to make this possible and i'm still waiting for it to see some of the accuracy measures because i think those throughout the period you can publish but any test right now is much better than the one we have right now which takes almost a whole day turnaround and is only 30 to 50 percent accurate so this test it is on a rapid scale can immediately tell people you need to quarantine or not is would be infinitely better and faster in terms of helping us contain this fire so what we have now ok what i'd like to ask about president trump because he had 1st was saying this wasn't really a problem then suddenly he began to take stronger measures under criticism most recently of the 2 trillion dollar bailout which came from the senate and then telling general motors to make a ventilators so that's all good but has

harvard t.the -- t.h. chan school of public health, thank you for talking with us. >> thank you for having me. >> woodruff: history of a ve different kinwas made today, when japan and the international olympic committee decided to postpone this summer's games to 2021. john yang looks at what drove that decision and the ramifications. >> yang: judy, today's decision affects thousands of athletes around the world, and creates huge logistical headaches for organizers. christine brennan of "usa today" has covered every ol games, both summer and winter, since 1984. she joins us by skype fr washington, d.c. christine, how much of this decision was driven by the athletes' n concerns about their own health and welfare? >> john, all of it. this was stunning. when leaders don't lead, the athletes filled the void. and the international olympic committee president, thomas bach, is actually a former athlete, former olympic gold dalist. one would have thought he would the athlete's probe magnitude of he did not. he sat in his ivory tower and kept saying, we're not tking about postpoment. we're not talking about cancella