Yes. It is non contagious although you may need note for gym class.
Yes. Pr does not appear to have any serious complications. And the contagiousness is questionable.
Pityriasis rosea. Pityriasis rosea (pr) is an acute, self-limited, exanthematous skin disease characterized by the appearance of slightly inflammatory, oval, papulosquamous lesions on the trunk and proximal areas of the extremities. The possibilities for having a viral etiology has been discussed. Read more...