Fig. 1
From: Dual respiratory virus detection in adult patients with acute respiratory illness
Formula for the estimation of the number of adult hospitalized patients with acute respiratory illnesses who were simultaneously detected as having both respiratory viruses A and B according to the Korean national respiratory virus surveillance dataset. DRVD, dual respiratory virus detection; C(A), conversion constant of respiratory virus A; C(B), conversion constant of respiratory virus B; P(A)k, prevalence of respiratory virus A during k week according to the surveillance dataset; P(B)k, prevalence of respiratory virus B during k week according to the surveillance dataset; Test Nk, number of polymerase chain reaction tests performed during k week at the study centers