An example of MS-DOS's command-line interface, this one showing that the current directory is the root of drive C. MS-DOS (/ËÉmÉsËdÉs/ EM-es-DOSS; acronym for Microsoft Disk Operating System) is a discontinued operating system for x86-based personal computers mostly developed by Microsoft.
Written by: Kierstan Boyd. Nov. 08, 2012. The main symptom of vitamin A deficiency is vision loss and blindness. Vision loss often begins as a problem adjusting to seeing in the dark, or night blindness. People with night blindness do not see well in the dark, but are able to see normally if enough light is present.
2 PREFACE Vitamin A deficiency affects 190 million; pre-school children in the World Health Organization (WHO) regions of Africa and South East Asia 1. In South Africa in particular, 63.6 % of children age 1-9 years were found to be vitamin A deficient in 2005 National Food consumption survey.Vitamin A deficiency is a major contributor to under-five mortality and can cause visual impairment and increase the risk to illness and death due to measles and diarrhoea..2. Situational Analysis of Vitamin A supplementation in South Africa The Department of Health launched a national vitamin A supplementation (VAS) program in 2001 following the 1994 SAVACG survey which showed that vitamin A deficiency was a public health problem in South Africa.