Prevention is the best defence! No-one wants to be at home for days on end watching Jeremy Kyle and sipping Lemsip, so make sure your immune system is on red alert and ready for battle! A bare minimum of 5 different fruit and vegetables a day is a must; however if you often struggle with this, a multivitamin focusing on immune support such as Perricone MD Vitamin C Ester Dietary Supplement would be a good…