Thirty-three years after its discovery, the Human Immunodeficiency Virus (HIV), responsible for the AIDS pandemic, remains a major public health problem despite advanced researches providing better diagnostic and therapeutic tools. The virus targets especially CD4+ T cells, leading to deficiency of ...the immune system and altering therefore defense against infections and cancer cells. Antiretroviral
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The World Health Organization (WHO) endorses the use of population-based prevalence surveys for estimating the prevalence of trachoma. In general, the prevalence of TF in children aged 1–9 years and the prevalence of TT in adults aged ≥ 15 years are measured at the same time in any district bein...g surveyed. This was the approach of the Global Trachoma Mapping Project, which undertook baseline surveys in > 1500 districts worldwide in order to provide the data required to start interventions where needed.
The survey design recommended by WHO is a two-stage cluster random sample survey, which uses probability proportional to size sampling to select 20–30 villages, and random, systematic or quasi-random sampling to select 25–30 households in each of those villages. In most surveys, everyone aged ≥ 1 year living in selected households is examined.
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FAST FACTS FROM THE 2013-14 ZAMBIA DEMOGRAPHIC AND HEALTH SURVEY
30 January 2020
This document outlines the standard operating procedures for detection and response to case/s of suspected novel coronavirus disease (2019-nCoV) in South Africa. The content of this document should inform provincial preparedness plans.