Nicolas Blanchemain, Professor at Lille university and researcher specialized in biomaterials, wears a new "filtering and decontaminating" mask designed by French start-up BioSerenity during an interview with Reuters at the INSERM research center of Lille University Medical School, amid the spread of the coronavirus disease (COVID-19) in France, February 22, 2021. Picture taken, February 22, 2021. REUTERS/Pascal Rossignol