The author is an eminent Paediatrician, a Chief Consultant at a reputed hospital and a Professor at a prestigious medical college with nearly 25 years of experience in this field. On an average he treats 400 children per week, has given around 2,00,000 vaccinations and has solved around millions of queries from parents on the same. His main aim is to see that all the children worldwide are immunised, so that they are healthy and happy which in turn would increase the productivity of the entire nation since children are the future citizens of a nation.