How can the world allocate COVID-19 vaccines fairly? It’s an ethical question many Penn experts are contemplating. One fact is certain, they say: Distribution must not exacerbate disparities and inequities in health care. On Dec. 11, the FDA granted an Emergency Use Authorization for the Pfizer-BioNTech COVID-19 vaccine, with similar authorization for the Moderna COVID-19 vaccine coming a week later. Frontline health care workers across the United States, including at the hospitals of the University of Pennsylvania Health Syst...