The French scientist who promoted the discredited hydroxychloroquine treatment for Covid-19 backed by Donald Trump faces being pushed out of the infectious diseases institute he founded, amid concerns from key members over its role in feeding conspiracy theories and an investigation by regulators into its clinical studies.

Didier Raoult has built a worldwide following throughout the pandemic for his support of the malaria drug despite its failure in randomised control trials. Multiple studies, including by the Recovery trial and the World Health Organisation, have found hydroxychloroquine to be ineffective in treating Covid-19.

University professors must retire at the age of 68 in France. Raoult turned 69 in March, and so from 31 August will no longer be eligible to continue his post as a researcher and medical practitioner at the University of Aix-Marseille and Marseille University Hospitals.