Apoorva Mandavilli writing at The NY Times:
As many as 25 percent of people infected with the new coronavirus may not show symptoms, the director of the Centers for Disease Control and Prevention warns — a startlingly high number that complicates efforts to predict the pandemic’s course and strategies to mitigate its spread.
I’m not sure what’s taken the C.D.C. so long to realize this, I saw the same reports weeks ago coming out of research in China, South Korea, and Vo, Italy. This is the Achilles Heel in our current approach to dealing with this virus, and I’m afraid we won’t move past it until we have widespread testing.
Gravitropic 