The COVID-19 pandemic highlighted the unmet medical need for new antivirals that can help tackle existing and emerging viral infections. Funded by the European Innovation Council, the FLUIDITY project proposed to develop an innovative oral small molecule that limit internalisation and intracellular trafficking of viruses. The underlying concept is based on interfering with host membrane fluidity, which is beneficial as it has a broad-spectrum effect against multiple viruses. The molecule has also demonstrated an immunomodulatory effect, avoiding the immune system to react excessively after infection. As human safety is validated, the project was to perform a human proof of concept.