COMMON COLD VIRUS

Baker's yeast may hold some clues per Dr Asim Dasgupta Does Ordinary Baker's Yeast Hold Secret to Curing Common Cold November 22, 1994 New York Times News Service - Sandra Blakeslee editorial. 
https://www.nytimes.com/1994/11/22/science/does-ordinary-baker-s-yeast-hold-secret-to-curing-common-cold.html
+ Nutritional Yeast (better/best) @ https://nutritionfacts.org/video/nutritional-yeast-to-prevent-the-common-cold/
Beta glucan fiber in nutritional yeast may improve immune function, but there is a concern about lead contamination in some brands. (Check country of origin.) 3/25/2015

+ https://www.sciencedaily.com/releases/2011/08/110809212430.htm - "Injecting mice with simple baker's yeast protects against the fatal fungal infection, aspergillosis, according to new research.
The work could lead to the development of a human vaccine that protects immuno-compromised people against a range of life-threatening fungal infections, for which current therapy often fails."