HIV/AIDS: Causes and Prevention MCQs Quiz | Class 10

Understanding HIV/AIDS: Causes and Prevention

HIV (Human Immunodeficiency Virus) is a virus that attacks the body’s immune system. If left untreated, it can lead to AIDS (Acquired Immunodeficiency Syndrome). AIDS is the final stage of HIV infection, where the immune system is severely damaged, making the body vulnerable to various infections and diseases.

Key Topics Covered:

1. Transmission: How HIV spreads from one person to another.
2. Prevention: Measures to avoid HIV infection.
3. Awareness: The importance of understanding HIV/AIDS to reduce stigma and promote testing.

1. Modes of HIV Transmission:

HIV is primarily transmitted through specific body fluids from an infected person:

• Blood: Sharing needles, syringes, or other drug injection equipment; blood transfusions (now very rare due to screening).
• Semen (cum) and Pre-seminal fluid (pre-cum): Unprotected sexual contact (vaginal, anal, or oral).
• Rectal fluids: Anal sex.
• Vaginal fluids: Vaginal sex.
• Breast milk: From an HIV-positive mother to her child during breastfeeding.

Important Note: HIV is NOT transmitted through casual contact like hugging, kissing, sharing food, toilet seats, insect bites, or air/water.

2. HIV Prevention Strategies:

Prevention is key to controlling the spread of HIV.

• Safe Sexual Practices:
  • Using condoms consistently and correctly during sexual activity.
  • Limiting the number of sexual partners.
  • Getting tested and knowing your partner’s HIV status.
• Avoid Sharing Needles: Never share needles, syringes, or other drug injection equipment.
• Testing and Treatment:
  • Regular HIV testing, especially for those at higher risk.
  • For HIV-positive individuals, Antiretroviral Therapy (ART) can reduce the viral load to undetectable levels, making transmission virtually impossible (Undetectable = Untransmittable or U=U).
• PrEP (Pre-Exposure Prophylaxis): A daily medicine taken by HIV-negative people at high risk to prevent HIV infection.
• PEP (Post-Exposure Prophylaxis): Medications taken within 72 hours after potential exposure to HIV to prevent infection.
• Mother-to-Child Transmission Prevention: HIV-positive pregnant women can take ART to significantly reduce the risk of transmitting HIV to their babies.

3. Awareness and Stigma Reduction:

Lack of awareness and the associated stigma are major barriers to effective HIV prevention and treatment.

• Education: Understanding how HIV is transmitted and prevented helps individuals make informed decisions.
• Testing: Encouraging regular testing helps people know their status and access treatment early.
• Challenging Stigma: Educating communities to treat people living with HIV with respect and dignity, reducing discrimination.

Quick Revision:

• HIV attacks: Immune system (CD4 cells).
• AIDS is: Advanced stage of HIV infection.
• Main transmission routes: Unprotected sex, shared needles, mother-to-child.
• Prevention includes: Condoms, no shared needles, ART, PrEP, PEP.
• Awareness helps: Reduce stigma and promote testing.

Extra Practice Questions:

1. Which cells in the human immune system are primarily attacked by HIV?
   A) Red blood cells
   B) B-cells
   C) T-helper cells (CD4 cells)
   D) Platelets
   Correct Answer: C) T-helper cells (CD4 cells)
2. What is the main goal of Antiretroviral Therapy (ART) for people living with HIV?
   A) To completely cure HIV infection
   B) To boost the body’s metabolism
   C) To reduce the viral load and strengthen the immune system
   D) To prevent other sexually transmitted infections
   Correct Answer: C) To reduce the viral load and strengthen the immune system
3. A person with an “undetectable” viral load due to ART can still transmit HIV through sexual contact. True or False?
   A) True
   B) False
   C) Only if they stop medication
   D) Only to their children
   Correct Answer: B) False (U=U principle)
4. Which of the following is a common symptom in the early (acute) stage of HIV infection?
   A) Weight gain
   B) Rash and flu-like symptoms
   C) Increased appetite
   D) Hair loss
   Correct Answer: B) Rash and flu-like symptoms
5. What is PrEP primarily used for?
   A) Treating existing HIV infection
   B) Preventing HIV infection in high-risk individuals
   C) Diagnosing HIV infection
   D) Curing AIDS
   Correct Answer: B) Preventing HIV infection in high-risk individuals