Vectors can be defined as:

Associate the following diseases/infections with their causative agents:
$(a)$ Sleeping sickness
$(b)$ $SARS$
$(c)$ Kala-azar
$(d)$ Acne
$(e)$ $AIDS$
$(f)$ Dengue fever
$(g)$ Malaria
$(h)$ Brain fever
$(i)$ Chickenpox
$(j)$ Polio

List three harmful effects of infectious disease.

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

Making anti-viral drugs is more difficult than making anti-bacterial medicines because

Akhilesh is having a headache and fever. He takes some pills to reduce the fever and headache before going to the doctor. What is this type of treatment called? How can we reduce the effects of the disease? What is the limitation of this type of treatment? What is the possible remedy for these diseases?