At a time when we have probably all been thinking about immunity more than ever, we welcome Alex Laird, a medical herbalist trained in biomedicine and plant pharmacology, who treats patients in the only NHS herbal clinic based in a UK hospital. Alex will explain how plants contain medicine for us, and how these phytonutrients act on specific functions of the body to support our health and immunity. Alex is a the author of Root to Stem: a Seasonal Guide to Natural Recipes and Remedies for Everyday Life. She is the founding director of the charity Living Medicine.