HIV and AIDS Facts

HIV and AIDS Facts

Ineffective vaccine of HIV 

American researchers have stopped the clinical trials of HIV vaccine due to its ineffectiveness. Vaccine contained DNA fragments which had genetic material of the protein molecule of HIV. As it was assumed that these safe fragments would produce antibodies, which on action could destroy the virus.

For experiment 2504 HIV-negative candidates were chosen from 19 major cities of United States. Half of the peoples were given vaccine against HIV, and the other half PLACEBO. As doctors had presumed that some candidates will be infected in near future, they could only wait for the results. After twenty eight weeks of examination, HIV infection was found in 27 vaccinated candidates, and 21 persons from the control group. Unfortunately, during clinical trials of inhibitory effect of vaccine could be confirmed, so the development of this vaccine was stopped.
HIV and AIDS Facts


What is "Serological Window" or "HIV window period" 

Exercise number1. 

You are transfused with HIV-negative healthy donor. What are the chances to get HIV infection from him?

Answer. 

Chances are more, than during sexual intercourse with HIV infected person (with use of condom), which is 1 in 4000 cases.

The HIV test does not detect the amount of virus, and the quantity of antigens that the body produces to fight with the virus. This takes some time, hence if the donor is HIV infected, the test will not detect immediately, only after the organism will produce this antigen. This period is known as .

Knowing this the blood transfusion centers keep the blood or its components for a period of six months. After that again HIV test is done on the donor, if result shows negative then blood can be considered for use. But! According to WHO, the serological conversion process in 95% infected persons is 3months, and 99.9% is 6months.

The rest 0.1% (1 in 1000 donor) the antibody production is 1-1.5 years. And may god help you from such donor.

Exercise number 2. 

May a patient who is dying due to AIDS (The final stage of disease) have a negative test result of HIV?
  • The solution can be read on the page  
  • The immunity wear rate among Males and Females 
  • The female organism is more adapted towards existence as compared to men. Often it can be done without men (as PARTHOGENETIC reproduction in plants). Therefore women are more tough and the immune system of the weaker sex is more stable. Due to this females have a longer life span.


Japanese scientists have established that, with age level of lymphocytes falls rapidly in males than in females. Sexual hormone particularly estrogen affects the quantity of lymphocytes and the immune system. Therefore, it can be assumed that the immune system in males degrades faster, but the biological age of a person is assessed according to the immune system.

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