Before revision:  First, the population is separated, according to compliance with the disease control directives (  shelter-in-place, masks/face coverings, physical distancing, etc.) , into those who fully follow the directives and those who only partially comply with the directives or are necessarily mobile .
After revision:  First, the population is divided according to its compliance with disease control directives ( shelter-in-place, masks/face coverings, physical distancing, etc.) , into those who fully follow the directives and those who only partially comply with the directives or are necessarily mobile .