Background: On 12th December 2019, pneumonia of unknown etiology was reported in number human cases from Wuhan, central China. 11th February 2020, the WHO named disease COVID-19, short for “COronaVIrus Disease 2019”. This COVID-19 out-break has grown substantially to that pandemic nature currently. Close personal contact and respiratory droplets sneezes coughs patient can disseminate SARS-CoV-2...

abstract        background and objective: this study was conducted to evaluate epidemiology of risk factors for hepatitis c virus (hcv) transmission, and determine the association of its genotypes with viral load and response to treatment in patients referred to the infectious disease clinic of khorramabad.         methods: the study included patients infected with hepatitis c referred to the i...

In this paper, the optical properties of one dimensional fractal structures are investigated. We consider six typical fractal photonic structures: the symmetric dual cantor-like fractal structure, the asymmetric dual cantor-like fractal structure, the single cantor-like fractal structure, the symmetric dual golden-section fractal structure, the asymmetric dual golden-section fractal structure a...