Approximately 200 per 100,000 of those older than 65 die yearly from influenza. What is the Flu ? What are the symptoms ? Who is considered high-risk ? What are the complications ? Will it lead to heart attack ? What should you do if you have the flu ? 本地65岁以上人士当中，每十万人约有两百人因流感去世！流感是较严重的感冒？哪些人是高风险群？流感会引发什么并发症？会导致心脏病发作？患上流感，怎样才是正确的治疗方式？