Question

In: Biology

1. When an individual becomes infected with HIV, what symptoms will he or she exhibit? 2....

1. When an individual becomes infected with HIV, what symptoms will he or she exhibit?

2. How many types of HIV are known to be in existence?

3. How did HIV arrive in the human population?

4. Because infection with HIV does not result in elimination of the virus by the immune system, does this mean that the immune system does not respond?

5. What happens to T cells in an individual who is infected with HIV?

6. What is the difference between a primary immunodeficiency and a secondary immunodeficiency?

7. As of 1999, what are the statistics in terms of how many people are infected with HIV and mortality associated with the virus?

8. What is the recommended treatment today for AIDS?

9. Cite a couple of reasons why there is no effective vaccine for AIDS .

Expert Solution

Answer1

HIV symptoms

mononucleosis,
viral hepatitis,
sexual transmitted infections
needle transfusion

Answer2

There are two main types of HIV

.

HIV-1 is the most common type

HIV-2 occurs in a much smaller number of people, mostly in West Africa.

Both the HIV leads to AIDS

Answer 3

chimpanzee in West Africa as the source of HIV infection in humans. it believe that the chimpanzee version virus transmitted to humans and mutated into HIV . this will spread when humans go for hunting these chimpanzees for meat and came into contact with their infected blood.

Answer 4

Immune system respond because HIV attacks only T-cells , other cells are work normally.

Answer 5

HIV attacks and kills crucial T-helper cells. Without T-helper many other immune system cells cannot not work properly, including B-cells that make antibodies.

Answer 6

Primary immunodeficiencies are hereditary; secondary immunodeficiencies are acquired.

Answer 7

People newly infected with HIV in 1999 Total 5.4 million Adults 4.7 million Women 2.3 million Children

Answer 8

Currently No cure exists for AIDS,

Answer 9

Extensive viral clade and sequence diversity
Early establishment of latent viral reservoirs

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