艾滋病英语作文:ABC OF AIDS_1200字
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艾滋病英语作文:ABC OF AIDS_1200字
AIDS is the abbreviation1) of ACQUIRED IMMUNE
DEFICIENCY SYNDROME.It is a xxplicated illness that
may involve several phases.it is caused by a virus that
can be passed from person to person.AIDS impairs the
human body's immune system,the system responsible for
keeping off disease,and leaves the victim easily
affected by various infection.
The virus enters the bloodstream and destroys
certain white blood cells,called T lymphocytes2),which play a key role in the functioning of the immune
system.The virus can also infect other types of cells
in the body,including the immune-system cells knows
as macrophages3).Unlike T lymphocytes,however,macrophages are not killed by the virus.
Most people recently infected by the AIDS virus
look and feel healthy.In some people the virus may
remain inactive,and these people act as carriers,remaining apparently healthy but still able to infect
others.After a few years,some people may develop AIDS-related xxplex,or ARC.Its symptoms may include fever,fatigue4),weight loss,skin rashes,a fungal5)
infection of the mouth known as thrush,lack of
resistance to infection,and swollen lymph nodes.
AIDS is spread by direct infection of the
bloodstream with body fluids that contain the AIDS
virus,particular blood and semen from an HIV-infected
person.The virus is usually spread through various
forms of sexual intercourse,the transfusion of virus-infected blood,or the sharing of HIV-contaminated
intravenous6) need les.