میزان بروز یک بیماری و بروز دادن دادن علایم یک بیماری به انگلیسی

Question

میزان بروز یک بیماری یا بروز علایم یک بیماری 

Answer 1

The rate of appearance of symptoms

Example from a medical book:

"In this study a large proportion of patients were asymptomatic when first detected. With prolonged follow-up the rate of appearance of symptoms in this group was low."