conclusions: there are important deficits in adolescents’ knowledge about hbv that requires attention of health educators to tailor educational programs for specific groups. objectives: the aim of this study was to assess iranian adolescents’ knowledge about hepatitis b (hbv) and associated factors. patients and methods: we conducted a questionnaire-based national survey of 18-year-old adolesce...

The resolving power of high-resolution transmission electron microscopes is characterized by the information limit, which reflects the size of the smallest object detail observable with a particular instrument. We introduce a highly accurate measurement method for the information limit, which is suitable for modern aberration-corrected electron microscopes. An experimental comparison with the t...

We use a simple Lotka-Volterra model of the disease transmission process to analyse the dynamic population structure in two scenarios. Firstly a vaccine is available on the market at a constant price through time. Secondly, the vaccine is publicly provided. The vaccine works either by giving partial or full immunity to the disease. We analyse market provision for vaccines providing partial immu...