Jason Jahanian was hospitalized with COVID-19 in early April. He and his doctors believe convalescent plasma made the difference in his recovery. "Convalescent plasma is such an intriguing concept," Dr. Stahel, Chief Medical Officer at The Medical Center of Aurora, explained. "It goes back about 150 years, to the late 19th century, long before antibiotics were invented, before anti-bacterial, anti-viral treatments were available. We took people who were infected before, and a month later took their blood, because that blood would mount an immune response and build antibodies to that pathogen. So that's called passive immunization."

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