evidence provided from studies in iran points to a possible bias in application of the standard epi cluster sampling procedure, when carried out in populations with highly variant birth rates, tends to over-represent the low birth rate, i.e. higher socio-economic, strata, and if the entity under study shows significant socio-economic gradient, then the estimates arrived at by this method might ...

background kawasaki disease (kd) is an acute multisystem vascular syndrome of unknown etiology that is the leading cause of acquired heart disease in children of developed counties. objectives we aimed to evaluate the epidemiological characteristics and clinical manifestations of kd in children residing in the southwest of iran. patients and methods in this retrospective study, we reviewed the ...

Background Neuroblastoma is the third most common malignancy in children with a very heterogeneous feature. In this study, the epidemiological and clinical characteristics of children with neuroblastoma treated in a referral oncology hospital in Shiraz, Southern Iran, were investigated. Material and method In this historical cohort study, the medical files of 36 children under 18 years old ...

Background. Population of elder Chinese has been increasing, but the pattern and trend of cancer in that population was rarely reported. Methods. Mortality rates for cancer of all sites and of the site specific of the overall and elderly Chinese from 2004 to 2005 were estimated. The age structure of world population was used to observe the changes in the age-standardized mortality rates from 19...

La gripe es una infección viral que afecta a la población general, pero preferentemente a los extremos de la vida. La gripe pediátrica se presenta básicamente antes de los 5 años. La sintomatología es bastante inespecífica en edades inferiores a los 2 años y solo a partir de los 4-5 años sus manifestaciones clínicas puede orientarnos hacia esta enfermedad1. Existen pocos estudios sobre la gripe...

RNA viruses are a major threat to human health. Here, based on extensive literature searches carried out over a period of 18 years, we provide a catalogue of all 214 known human-infective RNA virus species. We link these viruses to metadata for a number of traits that influence their epidemiology, including the date of the first report of human infection, transmissibility in human populations, ...

It is now 50 years since the discovery of the hepatitis B virus (HBV), and, despite the availability of a prophylactic vaccine for more than 20 years, HBV infection remains a disease of significant global health burden. It is estimated that more than 240 million people are chronically infected with HBV and, therefore, are at risk for the development of cirrhosis, hepatic decompensation, and hep...

Human prion diseases are a group of transmissible, progressive, and invariably fatal neurodegenerative disorders, which include Kuru, Creutzfeldt-Jakob disease (CJD), Gerstmann-Sträussler-Scheinker syndrome, and fatal familial insomnia. Human prion diseases affect approximately 1-2 persons per million worldwide annually, occurring in sporadic, inherited, and acquired forms. These diseases have ...