This month’s Scientific American includes an article: "How to Boost Your Immunity—Some simple, practical steps can raise your resistance to viruses” by Claudia Wallis.

Fear and fraud often travel together. As coronavirus anxiety began to spread across the land, so did bogus nostrums promising protection from this modern-day plague. As early as March 6, U.S. regulators began to issue warnings to companies promoting false claims, such as this one touting the benefits of drinking a daily dose of silver particles: “It's actually widely acknowledged in both science and the medical industry that ionic silver kills coronaviruses.” Um, no.

For people who hope to build up their resistance to coronavirus and infections of all kinds, there are no magic formulas—but there are some science-based steps one can take to maintain a healthy immune system. For starters, don't smoke. 

Second, make sure you are covering all your nutritional bases with a wide variety of vegetables, fruits and other elements of a healthy diet. “Eating an optimal diet reduces the risk of getting an infection and reduces the severity of infections,” says Wafaie Fawzi, professor of nutrition, epidemiology and global health at Harvard University's T.H. Chan School of Public Health.

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