De aktive stoffer er adsorberede, hvilket vil sige, at de er bundet til aluminiumsforbindelser, og vaccinen indeholder en adjuvans, der er et stof, som indeholder aluminium, for at fremme en bedre reaktion.
The active substances are ‘ adsorbed’, meaning that they are fixed onto aluminium compounds, and the vaccine contains an ‘ adjuvant’ (a compound containing aluminium) to stimulate a better response.