Cnn chief medical correspondent dr. sanjay gupta is here with more, and we've talked about the impacts of long covid for awhile now, but what does this study show? >> well, this was a really interesting study, and as i tell you about this, keep in mind that about 30% of people develop symptoms of covid that justing last a long time. weeks usually, but sometimes months. what they did in a study is they looked at death certificates from january of 2020 to june of this year and basically tried to find out, was long covid one of the causes of death? you find about 3,544 deaths, where long haulers ...