Name any three diseases transmitted through vectors.

Identify the diseases caused by protozoans:

Which one of the following is not a bacterial disease?

Health is not merely the absence of disease. How can we define health? Classify diseases on the basis of:
$(i)$ Duration of the diseases:
$(ii)$ Cause of the diseases. Give one example of each type.

Explain the following statements:
$(a)$ Being disease-free is not the same as being healthy.
$(b)$ Community health is essential for good individual health.
$(c)$ Villagers suffer from cholera more than urban people.

Differentiate between infectious and non-infectious diseases (any three differences).