HIV, or Human Immunodeficiency Virus, plays a detrimental role in the human immune system. Here's how it works, step by step:

1. **Entry**: HIV enters the body through various means such as unprotected sex, sharing needles, or from mother to child during birth or breastfeeding. The virus specifically targets CD4 cells, also known as T cells, which are a type of white blood cell crucial to the immune system.

2. **Infection**: Once inside the body, the virus attaches itself to a CD4 cell. It then fuses with the cell, releasing its RNA and enzymes into the host cell.

3. **Conversion**: The virus's RNA is converted into DNA by an enzyme called reverse transcriptase. This DNA is then integrated into the host cell's DNA with the help of another enzyme called integrase.

4. **Replication**: The virus uses the host cell's machinery to replicate itself. This process is aided by another viral enzyme called protease.

5. **Assembly and Release**: The newly formed HIV particles are assembled and then released from the host cell. This process kills the host cell and reduces the number of CD4 cells in the body.

6. **Immune System Deterioration**: As the number of CD4 cells decreases, the body becomes more susceptible to infections and diseases. This is because CD4 cells play a vital role in alerting the immune system to infections. Without enough CD4 cells, the immune system cannot function properly.

7. **Progression to AIDS**: If left untreated, HIV can destroy so many CD4 cells that the body can't fight off infections and diseases. At this stage, HIV infection can lead to AIDS (Acquired Immunodeficiency Syndrome), the final stage of HIV infection.

In summary, HIV deteriorates the human immune system by destroying CD4 cells, which are crucial for fighting off infections. Over time, this can lead to AIDS, a condition where the immune system is so weakened that it can't prevent or combat a range of diseases.

Question

HIV, or Human Immunodeficiency Virus, plays a detrimental role in the human immune system. Here's how it works, step by step:

1. **Entry**: HIV enters the body through various means such as unprotected sex, sharing needles, or from mother to child during birth or breastfeeding. The virus specifically targets CD4 cells, also known as T cells, which are a type of white blood cell crucial to the immune system.

2. **Infection**: Once inside the body, the virus attaches itself to a CD4 cell. It then fuses with the cell, releasing its RNA and enzymes into the host cell.

3. **Conversion**: The virus's RNA is converted into DNA by an enzyme called reverse transcriptase. This DNA is then integrated into the host cell's DNA with the help of another enzyme called integrase.

4. **Replication**: The virus uses the host cell's machinery to replicate itself. This process is aided by another viral enzyme called protease.

5. **Assembly and Release**: The newly formed HIV particles are assembled and then released from the host cell. This process kills the host cell and reduces the number of CD4 cells in the body.

6. **Immune System Deterioration**: As the number of CD4 cells decreases, the body becomes more susceptible to infections and diseases. This is because CD4 cells play a vital role in alerting the immune system to infections. Without enough CD4 cells, the immune system cannot function properly.

7. **Progression to AIDS**: If left untreated, HIV can destroy so many CD4 cells that the body can't fight off infections and diseases. At this stage, HIV infection can lead to AIDS (Acquired Immunodeficiency Syndrome), the final stage of HIV infection.

In summary, HIV deteriorates the human immune system by destroying CD4 cells, which are crucial for fighting off infections. Over time, this can lead to AIDS, a condition where the immune system is so weakened that it can't prevent or combat a range of diseases.

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