Another lot of States prepared to ease Coronavirus restrictions on US commerce this week, though health experts raising alarms that there is still too little diagnostic testing, while the White House forecast a scary jump in the nation's monthly jobless rate.

Colorado, Mississippi, Minnesota, Montana, and Tennessee were set to join several other States in reopening businesses without the means to screen systematically for infected people who may be contagious but asymptomatic and to trace their contacts with others they might have exposed.

Many merchants have voiced uncertainty about returning to work if the prerequisite public health measures are not in place, as advocated by the authorities.

Georgia, Oklahoma, Alaska, and South Carolina have already forged ahead to resume their business following weeks of mandatory lockdown that have thrown nearly one in six American workers out of their jobs.