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Topic Disease transmission
Asked 4 times across 2 UPSC exams over 41 years (1984–2025), peaking in 1984.
Key insights
- Most tested in CDS — 3 of 4 PYQs
- Most asked in 1984
- Recurs across 4 years (1984–2025)
How it travelled across exams
First appearance in each exam — the same idea, reframed.
CSE 1984 → CDS 2015
How the concept evolved
Long-running — most appearances (2 of 4) predate 2016, and it still returns.
Sample questions
You've seen the pattern — here are a few of the actual PYQs.
CDS2025
Which one of the following is an example of airborne disease ?
- A Tuberculosis
- B Malaria
- C Dengue
- D Cholera
Answer key not yet available (pending official release)
Science & Technology › Biology & Health
CDS2017
AIDS is caused by the Human Immuno-deficiency Virus (HIV). The transmission of HIV infection generally occurs through
- A eating contaminated food and water
- B transfusion of contaminated blood and blood products ✓
- C inhaling polluted air
- D shaking hand with infected person
✓ Correct answer: (B)
Science & Technology › Biology & Health
CDS2015
Which one of the following diseases in humans can spread through air ?
- A Dengue
- B Tuberculosis ✓
- C HIV-AIDS
- D Goitre
✓ Correct answer: (B)
Science & Technology › Biology & Health
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