5 Vaccines and sera, namely, sera for use in the circulatory system and sera for the treatment of embolisation, chemoembolisation, non-cancerous tumours and cancer; drug delivery agents, namely, preparations and substances for facilitating the delivery of pharmaceutical and medicinal preparations and substances; pharmaceutical preparations and substances for use in the circulatory system; pharmaceutical preparations and substances for embolisation; pharmaceutical preparations and substances for chemoembolisation; pharmaceutical preparations and substances for the treatment of cancer; pharmaceutical preparations and substances for the treatment of non-cancerous tumours; microspheres, namely, spherical particles composed of natural or synthetic materials with diameters in the micrometer range, containing pharmaceutical preparations for use in the circulatory system, for embolisation and chemoembolisation and for the treatment of cancer and non-cancerous tumours; pharmaceutical preparations, namely, microspheres comprising spherical particles composed of natural or synthetic materials with diameters in the micrometer range used as drug delivery agents; preparations and substances for facilitating the delivery of pharmaceutical and medicinal preparations and substances, namely, spherical particles composed of natural or synthetic materials with diameters in the micrometer range for treatment of tumors and arteriovenous malformations