Reduction in Cold and Flu with Vitamin D
GrassRoots Health Survey of people participating in their vitamin D action project
A higher resolution image is attached at the bottom of this page
See also Vitamin D Life
Review of common cold (42 billion dollars) prevention and treatment - Zinc works – Feb 2014
Respiratory infections reduced by 63 percent with 4000 IU vitamin D daily - RCT Dec 2012
Breathing category listing has items along with related searches
Common cold prevented and treated by Vitamin D, Vitamin C, Zinc, and Echinacea – review April 2018
which has the following chart

Short url = http://is.gd/VitDColdFlu