How prevalent is smell loss during COVID-19? Is COVID-19 related smell loss greater than smell loss due to other viral or respiratory illnesses? The Global Consortium for Chemosensory Research (GCCR) is a diverse group of scientists, clinicians, patient advocates, and community partners that formed during the COVID-19 pandemic in March 2020. Members are distributed across 30 countries on five continents. The GCCR is conducting a world-wide scientific study to assess the possible relationships between respiratory illness (e.g., COVID-19, influenza or the common cold) and their effects on smell & taste.