Which one of the following diseases is not transmitted by a mosquito?

Define an infectious disease. Give any one example of it.

$(a)$ What is immunisation?
$(b)$ Categorise the following into acute,chronic,infectious,or non-infectious diseases: Typhoid,$TB$,Goitre,Elephantiasis.

Which one of the following is not a bacterial disease?

Explain the following statement by giving two examples: 'It is not necessary that the pathogen affects an organ or tissue depending upon its point of entry.'

What are the symptoms and causes of malaria? What is the mode of transmission of the disease? How can it be prevented and controlled?