This book has been writing for the basic information purpose of respiratory infection. What are the necessary step should be taken to prevent the infection are also described. Various self-health protection tricks and criteria such as diet , exercise,e-protect are described. All these things are necessary to know to fight against pandemics. Some historical events of pandemics are also described. The major pathogens which impact global health also summarize here. Every effort has been made to make this book as possible as accurate. The overall purpose of this e-book is to the basic concern of respiratory health and awareness of the people of a pandemic. The book correlates with science, social, economy, history, etc.