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.
After Indian Independence in 1947, Hindi was declared the first official language, and attempts were made to declare Hindi the sole national language of India. Due to protests from Tamil Nadu and other non-Hindi-speaking states, it was decided to temporarily retain English for official purposes until at least 1965.