Just from my own N=1, I seem to have a very good immunity response, as I'm rarely sick even when people all around me become sick. Can I attribute that to my WOE? I'd like to think so, so I will. My health improvements due to keto are obvious, so it goes to reason that improved protection from viruses and bacteria is just one of the many benefits. Can it continue to protect in a pandemic situation? We may well find out.