Published this week in the journal Science Immunology (a study based on abusing mice again, alas).
In a good year, about 20000 persons in the US officially die from flu, in a bad year up to 50000 (according to the CDC) and of those who get the shot, about 2% experience either allergic reactions or unpleasant auto-immune side effects. Others who don’t get the shot may find that a well established LCHF/keto way of eating (esp after the first season or two) by itself is quite helpful in fending off or turning around flu symptoms fast.
“KD feeding resulted in an expansion of γδ T cells in the lung that improved barrier functions, thereby enhancing antiviral resistance. Expansion of these protective γδ T cells required metabolic adaptation to a ketogenic diet because neither feeding mice a high-fat, high-carbohydrate diet nor providing chemical ketone body substrate that bypasses hepatic ketogenesis protected against infection.”
And for more remedies including and beyond food as medicine: