Claudia Hammond talks to an Ukrainian psychotherapist about the increased demand for her services since Russia invaded her country. Is multiple sclerosis caused by a virus? Health Check looks at the latest evidence pointing to Epstein Barr virus, which more commonly causes glandular fever or mononucleosis. The discovery offers hope for a vaccine and new more effective treatments. Family doctor Ann Robinson joins Claudia to discuss the Epstein Barr findings as well as the extra risk of being infected with both Covid and flu viruses, and a promising gene therapy for haemophilia A. Presenter: Claudia Hammond Producer: Andrew Luck-Baker (Picture: A man and woman walk through rubble in the Podilskyi district of Kyiv, capital of Ukraine on 23 March 2022. Photo credit: Yuliia Ovsiannikova/Ukrinform/Future Publishing/Getty Images.)