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Convalescent plasma for COVID-19: Donor demographic factors associated high neutralising antibody titres.
Mehew, Jennifer; Johnson, Rachel; Roberts, David; Griffiths, Alex; Harvala, Heli.
  • Mehew J; Statistics and Clinical Studies, NHS Blood and Transplant, Bristol, UK.
  • Johnson R; Statistics and Clinical Studies, NHS Blood and Transplant, Bristol, UK.
  • Roberts D; Clinical, Research and Development, NHS Blood and Transplant, Oxford, UK.
  • Griffiths A; Radcliffe Department of Medicine and BRC Haematology Theme, University of Oxford, John Radcliffe Hospital, Oxford, UK.
  • Harvala H; Statistics and Clinical Studies, NHS Blood and Transplant, Bristol, UK.
Transfus Med ; 32(4): 327-337, 2022 Aug.
Article in English | MEDLINE | ID: covidwho-1794553
ABSTRACT

BACKGROUND:

Convalescent plasma containing high levels of SARS-CoV-2 antibodies has been studied as a possible treatment for COVID-19. Better understanding of predictors of high antibody levels is needed for improving supply of high-quality therapeutic plasma.

AIMS:

We have evaluated demographic and clinical factors associated with the probability of a convalescent plasma donor having high SARS-CoV-2 IgG antibody levels.

METHODS:

A total of 29,585 convalescent plasma donors employed during the first and second waves of the COVID-19 pandemic in England were included in this study. All had been tested for SARS-CoV-2 IgG antibodies by EUROimmun ELISA. A multivariable logistic regression model was used to quantify the association of the demographic and clinical factors with high (EUROimmun S/Co>6.0) SARS-CoV-2 IgG antibody level.

RESULTS:

Most of the donors were male (23,024; 78%), with white ethnic background (24,598;83%) and had not been tested for SARS-CoV-2 (15,266; 52%).Overall, less than 20% of convalescent plasma donors with confirmed or suspected SARS-CoV-2 infection harboured high SARS-CoV-2 antibody levels (n = 4,978). We found that older male donors who had been hospitalised with COVID-19 were most likely to harbour high levels of antibodies. White donors were less likely to have high SARS-CoV-2 antibody levels than donors with Asian orblack ethnic backgrounds residing in affluent areas likely reflecting ethnic inequality previously associated with SARS-CoV-2 infection.

DISCUSSION:

In a time of great uncertainty, and predicted new waves associated with newly emerging SARS-CoV-2 variants, these results will help us to target future convalescent plasma collections.
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Full text: Available Collection: International databases Database: MEDLINE Main subject: Pneumonia, Viral / Coronavirus Infections / COVID-19 Type of study: Experimental Studies / Observational study / Prognostic study Topics: Variants Limits: Female / Humans / Male Language: English Journal: Transfus Med Journal subject: Hematology Year: 2022 Document Type: Article Affiliation country: Tme.12868

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Full text: Available Collection: International databases Database: MEDLINE Main subject: Pneumonia, Viral / Coronavirus Infections / COVID-19 Type of study: Experimental Studies / Observational study / Prognostic study Topics: Variants Limits: Female / Humans / Male Language: English Journal: Transfus Med Journal subject: Hematology Year: 2022 Document Type: Article Affiliation country: Tme.12868