Part C Now go to the Preventing Seasonal Flu with Vaccination page. Use the links on the page to construct one to two paragraphs in response to the following questions. Why do you think the flu vaccine is recommended every year? How does the vaccine affect the immune system? When is the best time to get a flu vaccine? Why? Is the vaccine effective? Who is and who is not recommended to receive a flu vaccine? Why do these recommendations exist? Why is it important for the CDC to update its flu vaccination recommendations each year?