Now it's Vitamin D? LOL I agree that getting proper nutrition can reduce disease and sickness. I will also point out we already fortify certain foods like mike, cereal, and other things with Vitamin D but the flu is still prevalent here in the US. What did your reply have to do with my comment? No reason not to get the flu shot. When you secure your box do you just run an AV and firewall then call it day? No, you deploy a multi-layer defense right? The same with preventing disease and sickness.