This book brings the essentials of HIV testing. It is right to say that now is the best time for everyone infected to become aware of their own HIV status. The advanced information regarding HIV management efficiently reveals that antiretroviral treatment can prevent transmission, as well as chronic damage in the human body, if initiated early. Unfortunately, antiretrovirals are not broadly available in several places, especially in underdeveloped countries. In these countries, diagnosis of HIV infection must be kept in the agenda as a top priority, for the purpose of comprehending particular details of local epidemics and as an effort to halt the chain of HIV transmission. This book consists of contributions made by several renowned specialists in this field from across the world.