Quantitative maternal HBsAg predicts infection in infants as well as maternal viral load does. Antiviral therapy may be considered in pregnant women with an HBsAg level above 4-4.5 log IU/mL to interrupt mother-to-infant transmission. (Hepatology 2016;64:1451-1461).

The propagation characteristics of the core and ring modes and the coupling behaviors between them under micro bending in a specially designed micro-stmctured fiber were numerically studied with the finite-diference method.