Vicks First Defence Vicks First Defence is designed as a nasal spray to better target what’s considered as the main sites of infection: the back of the nose and the top of the throat. It’s a medical device intended to be used at the first symptoms of an emerging cold, or upon exposure to cold viruses, to reduce the ability of cold viruses to replicate in the nose. The micro-gel formula traps the cold viruses that start to develop at the back of the nose and helps reduce the chances of them developing. The micro gel formula inactivates the cold viruses reducing their ability to multiply and spread the infection It then contributes to a nasal washout effect to flush out cold virus by blowing your nose or swallowing. 15ml