The Truth About 'Boosting' Your Immune System Against Covid-19

There’s no shortage of articles advising you how to “boost” your immune system against Covid-19 – and no shortage of companies claiming their snack bar/smoothie/supplement/fermented tea is the solution.But if staving off coronavirus was as simple as eating a few blueberries or downing some kombucha, wouldn’t world leaders be telling us to do it?“There&rsq