Study	Reason for exclusion
Alzoughool 2020	Review
Barone 2020	Review
Bloch 2020	Review
Brasil Ministerio 2020	Standard operating procedure
Budhai 2020	Feasibility of plasma collection only
Cao 2020a	Ineligible intervention
Cao 2020b	Review
Casadevall 2020a	Review
Casadevall 2020b	Editorial
Chen 2020a	Review
Chen 2020b	Ineligible intervention
Chen 2020c	Ineligible intervention
ChiCTR2000030312	Study cancelled before starting recruitment
ChiCTR2000030381	Study cancelled before starting recruitment
ChiCTR2000030442	Study cancelled before starting recruitment
Datta 2020	Review
de Assis 2020	Ineligible indication
Dzik 2020	Review
Díez 2020	Ineligible intervention
Fleming 2020	Letter
Franchini 2020	Standard operating procedure
Hammarström 2020	Review
Hu 2020	Ineligible intervention
ISRCTN86534580	Ineligible intervention
Jawhara 2020	Review
Jiang 2020	Ineligible intervention
Kesici 2020	Letter
Khanna 2020	Review
Knudson 2020	Letter
Kominers 2020	Review
Kumar 2020	Review
Lancet Haematology 2020	Editorial
Lanza 2020	Letter
Lin 2020	Ineligible intervention
Ministerio de Salud 2020	Standard operating procedure
NCT04261426	Ineligible intervention
NCT04323800	Ineligible participant population (participants exposed to COVID‐19)
NCT04325672	Study cancelled before starting recruitment
NCT04344015	Feasibility of plasma collection only
NCT04344379	Ineligible intervention
NCT04344977	Feasibility of plasma collection only
NCT04350580	Ineligible intervention
NCT04360278	Feasibility of plasma collection only
NCT04368013	Ineligible intervention
Pawar 2020	Review
Qiu 2020	No use of convalescent plasma. Reporting on generalised collection of information about Covid‐19 infection relating to aetiology, pathology, symptoms, clinical presentation and some generalised pharmacological treatment methods. The papers do not contain patient data that we required.  Article translated by Rujan Shrestha and Ya‐Ying Wang via Cochrane TaskExchange
Roback 2020	Review
Robbiani 2020	Ineligible intervention
Rubin 2020	Review
Seghatchian 2020	Review
Sheridan 2020	Review
Shi 2020	Ineligible intervention
Syal 2020	Review
Tanne 2020	Review
Tiberghien 2020	Review
Tu 2020	No use of convalescent plasma. Reporting on generalised collection of information about Covid‐19 infection relating to aetiology, pathology, symptoms, clinical presentation and some generalised pharmacological treatment methods. The papers do not contain patient data that we required.  Article translated by Rujan Shrestha and Ya‐Ying Wang via Cochrane TaskExchange
Wong 2020	Review
Xie 2020	Ineligible intervention
Yoo 2020	Review
Zeng 2020a	Letter
Zhao 2020b	Review
Zhu 2020	Letter