TAKE HOME CAT 1&2.

** *****MANDATORY REQUIREMENTS***:****** **THE COVER PAGE SHOULD INDICATE CLEARLY YOUR: FULL NAMES AND STUDENT NUMBER. ****** **PART 1: 20 MARKS PART 2: 20 MARKS****** ***FORMAT: 1500 words minimum, Times New Roman, Font 12********* **DUE DATE: 8****TH**** JULY 2025, 11.59 PM****** **WORK SHOULD BE SENT TO **[**norata@mku.ac.ke**](mailto:norata@mku.ac.ke)**** **NOTE:****** **Spacing will be considered during marking.****** **Insertion of diagrams with clear explanations is acceptable****** **PART 1: CYTOKINES****** Write up about cytokines under the following sub-headings: 1. Introduction 2.Properties of Cytokines 3. Cytokine receptors 4. Cytokine Antagonists 5. Cytokine secretion by Th1 and Th2 Subsets 6. Therapeutic uses of Cytokines and their receptors 7. Cytokines in haematopoiesis PART 2: A 25-year-old healthcare worker receives their first dose of the COVID-19 mRNA vaccine. Three weeks later, they are accidentally exposed to SARS-CoV-2 virus at work but do not develop symptomatic COVID-19. Using this scenario, write a comprehensive essay that explains: - The mechanisms by which the mRNA vaccine stimulates both innate and adaptive immune responses (8 marks) - How immunological memory is established and why the person was protected despite incomplete vaccination (6 marks) - The roles of different immune cell types in providing this protection (6 marks)