Coronavirus disease 2019 (COVID-19) is a viral infection caused by severe acute respiratory syndrome corona virus 2 (SARS-CoV-2). The disease was first identified in 2019 in Wuhan, China, and has since spread globally, into a dreaded pandemic. The outbreak was declared a Public Health Emergency of International Concern on 30 January 2020 by the world health organization. The disease has spread to almost 200 countries and continue to do so, resulting in huge mortalities morbidities and associated economic burden to the affected countries. The pandemic has resulted in global shut down and has impact on life of every one. This book is analyzing the epidemiology of the covid 19,characteristics of the virus,its mode of spread, pathogenesis,pathology,clinical presentation,diagnosis,prevention, and prognosis of this infection.The impact of the disease on health care system,psycho social implications and economic impact to the society are also discussed in detail.This will seve as a reference manual for treating physicians,students,epidemiologists and researchers in the field. Knowledge about the infection is fast evolving hence the readers are advised to check out the latest guidelines especially in case of management of cases of Covid19.