A young COVID-19 patient at the Children’s Hospital of Philadelphia is recovering after receiving donated plasma, marking a possible breakthrough in the fight against the coronavirus pandemic.

Experts say those who have fully recovered from COVID-19 have antibodies in their plasma that can attack the virus. Now there’s a nationwide effort to collect blood plasma from recovered COVID-19 patients to assist in treating those currently ill with the disease or perhaps prevent others, like front-line medical workers, from getting the virus at all.

CHOP announced they successfully treated their first pediatric COVID-19 treatment with donated plasma.