CTV Medical Expert Dr. Marla Shapiro discusses the 'evolving picture' of Canada's battle with respiratory viruses during the fall season. Subscribe to CTV News to watch more videos: null Connect with CTV News: For live updates and latest headlines visit: http://www.ctvnews.ca/ For breaking news, fast, download the CTV News App: https://www.ctvnews.ca/app Must-watch stories and full programs at http://www.ctvnews.ca/video CTV News on TikTok: https://www.tiktok.com/discover/CTV-News CTV News on X (formerly Twitter): https://twitter.com/CTVNews CTV News on Reddit: https://www.reddit.com/user/CTVNEWS CTV News on LinkedIn: https://ca.linkedin.com/company/ctv-news --- CTV News is Canada's most-watched news organization both locally and nationally, and has a network of national, international, and local news operations.