Only about four in 10 Canadians get the flu shot each year, but doctors say that’s not enough. Here’s why the vaccine still matters, who benefits most and what the latest research shows. »»» Subscribe to CBC News to watch more videos: http://bit.ly/1RreYWS For breaking news, video, audio and in-depth coverage: https://www.cbc.ca/news Follow CBC News on TikTok: https://www.tiktok.com/@cbcnews Subscribe to CBC News on Snapchat: https://bit.ly/3leaWsr Download the CBC News app for iOS: http://