In 4 US state prisons, 3,300 inmates test positive, 96% without symptoms
One of the super-interesting things here, is that apparently everyone was in the specific window where they test positive for the virus.  This implies the population was recently infected, had not been previously infected, and it spread almost completely within a tight window.This implies a shocking high R(effective) for that population.  In 2 weeks we'll have super interesting data one way of the other on the CFR.