Value Health Cold & Flu Guard Value Health Cold & Flu Guard is specially formulated to help prevent the symptoms of cold & flu. It is designed to be used before exposure to known sources of cold & flu & can also be used at the first signs of a cold. Value Health Cold & Flu Guard works by coating the back of the nose & throat where cold & flu viruses take hold & start to develop. This coating traps, neutralises & then helps your body naturally get rid of the of the viruses before they can turn into a full-blown cold. Value Health Cold & Flu Guard contains up to 100 treatments.