How important is it to take flu vaccine before flying? | Frontline 2024/2025 前线追踪 2024/2025 EP39

Taiwanese singer-actress Barbie Hsu died from pneumonia after contracting influenza while on a vacation in Japan. How important is it to take flu vaccine? What should one take note of when travelling overseas? Separately, how does Chingay Parade celebrate SG60 this year? 台湾艺人大S徐熙媛到日本旅游时感染流感并发肺炎过世。打流感疫苗有多重要？出国游玩时要怎么照顾好身体？另外，妆艺大游行怎么庆祝SG60？