Essay on Pneumonia; Need help with Introduction

i am doing an essay about pneumonia base on a case study. i am struggling to start the introduction. i am not sure how i should start introducing the case study or whether i should start with the aetiology of pneumonia.

I recommend you to visit the following website: "sciencedirect.com" and then press the tab "search. Type " pneumonia" and "case study" as the words that you want to be included in papers' titles. Then read the introduction of the different case studies.

At the beginning of the article you should write about the pneumonia? What is " pneumonia" and write about the holes of the previous studies. What parameters were not covered by other researchers? Then add this point that the case study that you have done, tries to answer one of the unknown questions. In fact you should classify the introduction to several parts: 1. theory of "pneumonia"; 2. Literature review; 3. Statement of the problem; 4. The aim and significance of the study.

Hope this helps,
Cheers,
Ahmad