The entire human civilisation is now facing the disastrous impact of the pandemic. It seems to pose an apocalyptic consequence unless there is a vaccine in existence. Out of so many options, one option is creating immunity in the absence of a real vaccine. So immunising human health and life can be and would be the most important option in combating COVID-19. Now the question is how to build up this hard immunity. The present book takes into account accumulated facts, information and technology to describe green vegetables as a fresh source and booster of human immunity free from application of pernicious chemicals in the form of pesticides, fertilisers etc. The food should be strong enough to contribute to one's immunity. The authors hope that this book will create a long-lasting impact, away from the classical way of building immunity.