ALK-Abelló launched SLITone^® in the markets of Central and Southern Europe in November 2003. SLITone^® is a sublingual immunotherapy which is administered as drops under the tongue. Unlike previous SLIT products, which came in vials, the new vaccine comes in convenient single-dose containers. Three quarters of ALK-Abelló's SLIT patients use SLITone^®.