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We rarely see cases of smallpox or polio these days, but diseases like diabetes and heart problems are more common. Why? Class 8

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Science Class 8 Science 193 views May 07, 2026 Reviewed & updated Sep 17, 2026
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We rarely see cases of smallpox or polio these days, but diseases like diabetes and heart problems are more common. Why? Class 8

We rarely see cases of smallpox or polio these days, but diseases like diabetes and heart problems are more common. Why? Class 8

Answer:

  1. Widespread vaccination has helped to remove diseases like smallpox and polio.
  2. Diabetes and heart problems are increasing because of modern lifestyle changes: eating unhealthy (more processed/junk) food, lack of exercise, stress, and longer lifespans.

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