Anti-virals aim to fight viral infections such as COVID, shingles or the flu. Dr. Donald Vinh of the MUHC looks at when they are the most effective. Subscribe to CTV News to watch more videos: https://www.youtube.com/ctvnews 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.

Tag-uri: Coronavirus