Evolving SARS-CoV-2 severity among hospital and university affiliates in Spain and Greater Boston

Fares Amer, Fan Yun Lan, Mario Gil-Conesa, Amalia Sidossis, Daniel Bruque, Eirini Iliaki, Jane Buley, Neetha Nathan, Lou Ann Bruno-Murtha, Silvia Carlos, Stefanos N. Kales, Alejandro Fernandez-Montero