Despite its importance in the fight against pandemics such as COVID-19, a lesser-known face of nanomedicine is its potential to contribute to solutions to so-called rare or minority diseases. Coinciding with February 28th, the world day for rare diseases, experts invited by the Nanomed Spain platform and the Sant Joan de Déu Research Institute (IRSJD) present the latest advances in nanomedicine against three of these disorders: muscular dystrophy, cystic fibrosis and Fabry disease.