In 1960 Dr. Gras described the "phenomenon of antibody inhibition by hyper-immunization" which was later developed and expanded into numerous experimental projects becoming the basis of several research monographs.

The Research Institute, under the management of doctors Jordi Gras and Amadeo Foz is consolidated as research Centre and teaching in the 60's-70's decade, training the best specialists of Barcelona in biochemistry, bacteriology and infectious diseases, directing numerous doctoral theses and publishing research works of world-wide importance.