The pandemic's formal end on May 11 marks neither victory nor peace: It's a cessation of hostilities with a dangerous virus that is still very much with us.
To maintain such an uneasy truce, Americans will have to stay protected enough to prevent humanity's viral foe from staging a break-out of our shaky accord.
Providing that assurance, in turn, assumes scientists and public health officials all agree on what it means to be "protected enough," and that they can tell whether people are meeting that mark.
