1981 U.S.A. AIDS 5th June 1981 : The Centers
for Disease Control and Prevention issued a
report announcing that cases of rare
pneumonia were found among five
homosexual men in Los Angeles, California
which was later identified as the Aids Virus


HIV is thought to originate in Africa, where
humans caught it from chimpanzees and other
apes. The virus that affects the apes is very
similar to HIV and is called SIVcpz (simian
immunodeficiency virus). This virus spread to
humans following contact with infected
chimpanzee blood during the hunting of
chimpanzees.


For many years the human type of HIV was
limited to a remote part of Africa. With
improved connections the virus began to
spread worldwide


There are two types of HIV; they are HIV-1 and
HIV-2 and they have many subtypes. HIV-1 is the cause of the current worldwide
pandemic while HIV-2 is found in west Africa
but rarely elsewhere.


The strains of HIV-1 can be classified into four
groups: the "major" group M, the "outlier"
group O and two new groups, N and P. These
four groups may represent four separate
introductions of simian immunodeficiency
virus into humans.


Of these, Group O appears to be restricted to
west-central Africa and group N is rare.
More than 90 percent of HIV-1 infections
belong to HIV-1 group M. Within group M
there are known to be at least nine genetically
distinct subtypes (or clades) of HIV-1. These
are subtypes A, B, C, D, F, G, H, J and K.


Occasionally, two viruses of different subtypes
can meet in the cell of an infected person and
mix together their genetic material to create a
new hybrid virus. Many of these new strains
do not survive for long. These are called
"circulating recombinant forms" or CRFs. For
example, the CRF A/B is a mixture of
subtypes A and B.


Pls, tell someone toda that AIDS is REAL.

http://www.news-medical.net/health/What-Causes-AIDS.aspx

happy birthday to aids, wishing you short life