Discuss the theories of the origin of HIV/AIDS

Four theories have been propounded regarding the origin of HIV. They are -

Old Human Disease  

The first theory is that HIV has been around among mankind for a very long period and has recently become more virulent. One possibility is that the virus comes from a small and isolated ethnic group, which had acquired immunity to it, so that it has rarely caused death. When it spread outside this group, and reached people who had no such immunity, it became a killer disease. This theory states that diseases common in one part of the world, when camed to "virgin" territory have often proved a mortal danger to the newly exposed population. European diseases, such as measles and smallpox, virtually wiped out some North American Indians in the eighteenth and nineteenth centuries. This theory is important for a key reason. If this was the origin of the HIV, then the isolated groups immunity might enable a vaccine to be developed to protect the rest of the world. There are few completely isolated people left in the world, mainly in the rain forests of NCw Guinea, Amazon, and perhaps Central Africa. In fact we have in . India the nearly extinct Great Andamanese, a tribe having only 35 members according to the 1991 census. Since one of the early locations of AIDS was Central Africa, much speculation was focused on this possibility. By its nature, this is a theory that is _______ _____ _________ _______ _________ ______ ____ ________ _______ _______.
__________ __________ ________ _________ __________ ___ _____ __________ ____ __________.
____ _________ ____ ________ ____ ____ _______ _____ ___.
________ __________ _______ _________ _____ ___ ________ ___ __________.
________ ________ ________ _________ __________ ________.
___ _________ _______ ___ __________ ___ _____ ___ _______ ____ _________.
__________ _____ _________ _____ _____ _______ ____ _______ __________.
____ ______ _____ ____ _____ ________.
___ _______ ______ _________ ________ ______ ______ ____ ________.
______ ______ _______ ______ ________ _______ ____ ____ __________ _________ _____.
____ _____ ________ ______ ______ ___ _____ _______ _______ ______ _______.
______ ___ _______ _____ _____.
________ ____ _________ ________ _______ __________ _____ _________ _____ _____.
____ ______ __________ _____ _______ ________ ________.
_________ ___ _____ ___ ________ ________ _________ _________ _________ _________.
_____ __________ ___ ____ ________ _________ __________ _______ ___ _______ _________ _____.
___ ____ _________ ____ _______ ___ _____ _______ ________ __________.
_____ ________ __________ ___ _______.
____ ____ _________ _________ _________ _________ _________ _________ __________ _________ ________.
_______ ____ _____ _________ _____ ________ ________ ____ __________.
____ _________ _______ _______ _________.
_____ ____ __________ _______ ___ _________ _______ _____ _______ ____ ________ ___.
______ ______ ________ __________ _________.
_______ ________ _______ ____ ______ __________.
_______ ____ ____ _________ ______ _____ _____ ________ ________.
___ _____ _______ ____ __________.
____ ___ ________ ____ _______ ____.
___ __________ ____ ___ __________ ___ ________ ______ _________.
_____ _______ ____ ___ ________ _____.
_____ _____ ___ _________ __________.
____ ___ __________ _________ ___.
______ ____ ________ ____ __________ _______ _____ __________ __________ ___ ______.
_________ ____ ___ __________ ____ ______.
____ _________ ___ _________ __________ __________ ______ _______ __________ ______ ________ ________.
___ __________ __________ ___ _____ ______.
____ ___ ____ _________ ____ ___ __________ _______ _______ _______.
__________ ________ __________ ____ ____ ______ _________ ___ ___ __________ __________.
_______ __________ _______ ____ ___.
__________ _____ ___ ___ __________ ________ ___ _________ _______ _____ ___.
_________ ________ __________ _________ ______ _____.
________ _____ _______ __________ ____ ___ ____ ____ __________ _______ _______ __________.
________ _______ ____ ________ _____ _________ ___ ________ __________ _______.
_____ ______ ___ _____ ___ _______ __________ ____ _____ _________ ____ _________.
___ ________ ____ _________ ________ _________ _______ __________.
_____ ________ _______ ______ _____ ________ _________ _________ _____ __________.
________ ________ ___ ______ _______ __________.
____ ____ _______ _____ ____ __________ _________ __________ _______ ___ ___ _____.
_________ ______ ______ ________ ____ __________ _____ __________ ______.
__________ ___ _____ ________ _____ ________ _______ __________.
_____ _________ _____ ___ __________ _____ ______ ________.
____ _____ __________ _____ ___ _____ _________ _________ ____ ____ ___ _______.
_______ _______ ___ ___ ____.
___ ___ ____ ____ ____ _______ ______ ________ __________ _______ ________ ___.
________ ________ _________ ___ ____ _________ _____ ______ _______.
___ ______ ______ _____ ______ __________ ___ ___ __________ _______ _________.
_____ ___ __________ ____ _____ ___ _________ _________ _______ ____ ____ ____.
______ ________ ________ _______ ______ _______ ____ ____ ___ _______ __________ _________.
___ ________ _______ __________ ______.
_________ ____ __________ ____ _______ ________ ______ ____.
___ ___ ___ _____ _______ ________ _____ ____ _______ ______ __________ ___.
_______ _____ _____ ____ ______ _______ ________.
_____ _____ _______ _______ _______ _________ _______ ___ _______.
_________ _________ ___ ___ _______ _______ _______ _______.
________ ___ ________ _______ ______ ________.
________ ___ _________ ______ _____ __________ _______.
______ _____ _________ ________ _______ ________ ______ ________ ___ ____ _____ ________.
_________ ________ ________ ___ _____ ________ ________ _______ _________ ______ ___ ______.
_______ _____ ______ _______ _____ ________ ________ _____.
________ ____ _________ ________ _______ ___ ________ ______ _____.
_______ __________ ________ __________ _______ ________ __________ _______ _________ _______.
_________ _________ ____ ________ ________ _________ __________ ________.
________ ___ _________ ________ ______ ___ _________ ____ _____ ____.
________ _______ ____ _____ ______ ____ _____ _____ ____ ________ __________ _______.
___ ____ ______ _______ ___.
_________ _____ ____ ___ __________ _____.
_____ __________ ___ ___ ________ __________ _____ ______ ______ ___.
___ _________ _________ ________ ______ __________ _______ ______ __________.
_________ _______ _______ _____ _________ ________ __________ _____.
_____ _____ ________ ________ ____ ________ _____ ___ ______.
_______ ______ ______ ________ _____ ________ ________ _______ ____ __________ ______ ___.
______ _______ ______ _________ _________ _____ ___ _________ ___ _____ ___.
_____ __________ ________ ___ ___ ____ ____ _______ __________ ___ __________.
Get Full Answer on WhatsApp