A potential breakthrough in the treatment of COVID-19 has come as UMass Memorial Medical Center in Worcester reports promising results with its first blood plasma treatment of a seriously ill coronavirus patient this past Saturday.

"The ability to have a treatment that works this quickly and this dramatically is just a huge weapon in the arsenal," said Dr. Jonathan Gerber, chief of hematology/oncology and medical director of the hospital's cancer center. "We actually started to see some signs of promise by Saturday night, and certainly within 24 hours, that the patient that had almost required really maximum settings on a ventilator was able to come down substantially."