In terms of supplementing, while vitamin D is often heralded as an immunity hero at this time of year, Phoebe Liebling, nutritional therapist, explains that upping your omega-3 intake is also important; either by eating more oily fish, or taking a high-quality supplement such as Bare Biology’s Life and Soul daily capsules (£32.95, barebiology.com). “The primary fat source (of essential fatty acids) in your diet is going to make up your cell membranes. When your body responds to an illness the quality of your cells will determine whether it’s a pro-inflammatory or anti-inflammatory response, and upping your omega-3 intake will ensure it’s the latter.”