Role and Importance of Data in Public Health. Address the basic concepts, methods, and tools of public health data collection, use, and analysis and why evidence-based approaches are an essential part of public health practice.
Every language in the world-from English to Mandarin-evolved from a prehistoric 'mother tongue' first spoken in Africa tens of thousands of years ago, a new study reveals.
The earliest written and recorded language from the Mon-Khmer family, Khmer is spoken by 90% of the population (some 7 million people) and is used in most social and professional contexts such as government administration, education at all levels and in mass media.