This book explore the similarities between TB and COVID-19 although they belong to different kingdom, both microorganism that primarily affect the respiratory system and exhibit similar symptoms and diagnostic test for TB and COVID-19 have same similarities, I suspect that COVID-19 may have evolved from TB as. Virus can sometimes infect bacteria due to their small size. This book examines the classification of these microorganisms, the similarities in their symptoms and diagnostic test, and immune system affect the microbes and how to host cells are adaptation for the microbes and I also include the difference between TB and COVID-19, and I add a images with online sources, my opinion is one of the main reason is food habit because no one can lead a healthy life style, we are destroying ourselves in the name of civilization. Ancient people also affected with many disease but they are have strong immune system naturally and they are lead very discipline life style. But now only we want to money no one can do self loving. my suggestion is A DISEASE – FREE LIFE IS WEALTH.