https://www.sciencedaily.com/releases/2019/11/191115190327.htm"They showed that mice fed a ketogenic diet and infected with the influenza virus had a higher survival rate than mice on a high-carb normal diet. Specifically, the researchers found that the ketogenic diet triggered the release of gamma delta T cells, immune system cells that produce mucus in the cell linings of the lung -- while the high-carbohydrate diet did not."
https://link.springer.com/article/10.1007%2Fs00726-020-02823-6"Compelling evidence shows that taurine, creatine, carnosine, anserine, and 4-hydroxyproline, which are all abundant in red meat (e.g., beef, lamb and pork), play an important role in inhibiting oxidative stress (a common trigger of chronic diseases) and inflammation, ameliorating tissue (e.g., brain, heart, skeletal muscle, kidney, liver, gut, eye, and connective tissue) injury, improving metabolic profiles and the health of multiple systems, and enhancing immunity in animals and humans (Fig. 3). These nutrients may help to kill pathogenic bacteria, fungi, parasites, and viruses (including coronavirus) through enhancing the metabolism and functions of monocytes, macrophages and other cells of the immune system. "