A Cure in Survivors' Blood?

There’s a sliver of hope for people very ill with Covid-19. It’s a bold new treatment that involves taking the blood plasma of people who have recovered from the disease, and injecting it into people who are very sick. 

The secret is in the antibodies: a protein that is produced when someone’s immune system has fought the virus. But using antibodies to treat the sick is more complicated than just transferring them from one person to another. Jason Gale reports on what researchers are doing to sift through the many antibodies out there, and find the right ones to help people recover from being infected.

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