Developing nations can surely gain from Nanotechnology. This emerging technology can help the developing countries in diagnosing and treating diseases and even make available cleaner water. As per Peter Singer, Senior scientist, McLaughlin-Rotman Centre for Global Health: Nanotechnology has the potential to generate enormous health benefits for the more than 5 billion people living in the developing world. An effort on the part of the respective governments of the developing nations is required if they would like to see their respective countries progress in the health arena too. It is being said that countries like China, Brazil, India and South Africa have a number of nanotechnology research initiative which could help in meeting the needs of the poor in their countries. Now it needs to be seen how far these countries go forward in implementing nanotechnology in a responsible manner for the welfare of their people.