The entire human civilization 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 immunizing 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...