Corpus of Electronic Texts Edition
Rosa Anglica (Author: [unknown])

section 5


So we understand there are two kinds of smallpox, proper and improper.728 Smallpox proper is produced by the blood that boils, and this form occurs principally in children, and youths. Improper smallpox is caused by corrupted foods


which strong heat729 draws outward from the inner members to the extremities, and this can occur at any age; and therefore Avicenna says smallpox seizes men twice, i.e. proper smallpox and improper smallpox.