Is convalescent plasma therapy effective in COVIED- 19 patients ? and why it fails in some cases ?

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Harasit Kumar Paul

Dear Mohammed I. Rushdi, please go through the following link:

Article COVID-19: Convalescent plasma as a potential therapy

Preprint Convalescent Plasma Therapy for Covid-19: State of the Art

Dear Mohammed I. Rushdi, please go through the following attached document on "Convalescent plasma therapy in patients with COVID-19."