translation.en: Since 1999, several countries have introduced vaccination programmes against serogroup C, using a new generation of so called “conjugate” vaccines.
translation.mt: Mill-1999, diversi pajjiżi introduċew programmi ta' tilqim kontra s-serogrupp Ċ, fejn tintuża ġenerazzjoni ġdida ta' l-hekk imsejħa vaċċini “konġugati”.