The present invention provides a safe and effective vaccine composition against West Nile virus disease. A first metallic layer provided on a first surface of a flexible single-layer or multi-layer carrier film and a masking layer provided on the second surface of the carrier film, opposite to the first surface, are structured in accurate register relationship with each other by means of mutually synchronised structuring procedures. Each of the user accounts includes a profile where the profile can be a voter profile or a candidate profile.