Multiple choice

What is the immediate cause of an infectious disease?

  1. Microbes

  2. Plants

  3. Animals

  4. Non living organisms
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A Correct answer
Explanation

The immediate cause of an infectious disease is the pathogenic microbe that enters and multiplies in the body. Microbes such as bacteria, viruses, fungi, and protozoa are the direct agents that cause infectious diseases. Plants and animals can be vectors or sources, but the microbes themselves are the immediate cause.

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