Question

Why do we fall ill? Are there any viruses helpful for humans? Name them.​

Answer 1

Explanation:

Causes of diseases: Immediate cause and contributory cause. Immediate cause: The organisms that enter our body and causes disease is called immediate cause. For example, virus, bacteria, protozoa et

Answer 2

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➠ Causes of diseases: Immediate cause and contributory cause. Immediate cause: The organisms that enter our body and causes disease is called immediate cause. For example, virus, bacteria, protozoa etc.

➠These diseases can be transmitted from an infected person to a healthy person. 1. These diseases cannot be transmitted.