Orally administrable pharmaceutical composition production involves utilizing a storable suspension of viable of surviving eggs of parasitic, non human pathogen helminths of Trichuris suis. A sufficient number develops in helminth after taking the suspension, which is applied for stimulation of regulatory human T-cells. The suspension of the helminth eggs is treated in a sulfuric acid solution having a pH value less than 2. The pH value is adjusted more than 4 and a pharmacological acceptable preservative is added. An independent claim is also included for an orally administrable pharmaceutical composition, which has a storable suspension of parasitic, non humanpathogen helminths, where a sufficient number is developed in helminth after taking the suspension.
