In normal times, where there aren't critically urgent decisions to be made, that's the right approach. We don't have that luxury right now; we're continually charting the path forward, and if we don't have clean data then we'll need to chart it with unclean data.

And I think it's hard to argue that this study is worse than our existing case data, which is simply a daily aggregate of the number of new positive PCR tests labs report they've run. That's not even attempting to be a statistically valid estimate.