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There is a need to understand antibody responses following SARS-COV-2 infection and subsequent vaccination.
This is an observational study to determine changes in antibody levels in individuals who have previously donated COVID-19 convalescent plasma (CCP) and have now received at least one dose of a COVID-19 vaccine. At present these donors could no longer donate CCP as their virus-neutralising antibody levels do not reach the level required (Euroimmun of at least 6 IgG signal/control cutoff).
Two blood samples (9 ml total) will be collected at a local NHSBT donor centre to test the levels of the virus-neutralising antibodies in the plasma against different viral strains.
The results of this study will:
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| Measure | Description | Time Frame |
|---|---|---|
| Increase in antibody levels post-vaccination assessed via Euroimmun assay | Euroimmun assay | at least 28 days following vaccination |
| Increase in antibody levels post-vaccination assessed via Roche IgG assay | Roche IgG assay | at least 28 days following vaccination |
| Increase in antibody levels post-vaccination assessed vial live virus neutralization | Live virus neutralization (SARS-CoV-2 wild type (WT), alpha,beta and delta variants) | at least 28 days following vaccination |
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Inclusion Criteria:
Exclusion Criteria:
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Healthy volunteers
| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Lise Estcourt, MB BChir, DPhil | Contact | 07823 351936 | lise.estcourt@nhsbt.nhs.uk | |
| Ana Mora, PhD | Contact | 00 44 7889304288 | ana.mora@nhsbt.nhs.uk |
| Name | Affiliation | Role |
|---|---|---|
| Lise Estcourt, MB BChir, DPhil | NHS Blood and Transplant | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| NHSBT - Birmingham Donation Centre | Recruiting | Birmingham | United Kingdom |
N/A- Individual participant data will note be shared.
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| ID | Term |
|---|---|
| D000086382 | COVID-19 |
| ID | Term |
|---|---|
| D011024 | Pneumonia, Viral |
| D011014 | Pneumonia |
| D012141 | Respiratory Tract Infections |
| D007239 | Infections |
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Two EDTA samples will be collected from each donor. First sample will be analysed for SARS-CoV-2 IgG antibodies using EUROimmun assay. A second sample will be analysed for SARS-CoV-2 neutralising antibody testing and ELISA or other immunological assays for anti-S antibodies using SARS-CoV-2 strains.
| D014777 |
| Virus Diseases |
| D018352 | Coronavirus Infections |
| D003333 | Coronaviridae Infections |
| D030341 | Nidovirales Infections |
| D012327 | RNA Virus Infections |
| D008171 | Lung Diseases |
| D012140 | Respiratory Tract Diseases |