World Health Organisation estimates that 241 million children (1-14 years old) in India are at risk of parasitic intestinal worms known ais Soil-Transmitted Helminths (STH). This means India accounts for approximately 28 per cent of the total number children globally estimated to be at-risk of STH infections. On National Deworming Day (February 10), here are answers to some frequently asked questions about intestinal worms or Soil-Transmitted Helminths (STH).