I haven't been cold or flu sick in years. Wiping noses and catching my sick cubs puke. Nothing. I'm probably late in discovering this but I feel like fat serves as the canvas for germs and bacteria to stick to in your body. Vegan again, and staying that way (logic and common sense reasoning), but it might be any kind of fat. I made a dish using Grapeseed oil, and I think might have used too much. The congestion didn't last long though.