Can convalescent plasma help in the treatment of COVID-19?

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It is possible to take the plasma of patient with laboratory-confirmed COVID-19 who tested negative for SARS-CoV-2 (immunity to SARS-CoV-2) and administer this “convalescent” plasma containing neutralising antibody to patients with COVID-19. A study was now published in JAMA that demonstrated improvement of clinical parameters and lung CT in patients who received convalescent plasma with high virus-specific IgG and IgM ELISA titres.