Long-term kinetics of anti-RBD IgG antibodies 16 months after COVID-19 vaccination in Morocco: a longitudinal cohort study.

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Title: Long-term kinetics of anti-RBD IgG antibodies 16 months after COVID-19 vaccination in Morocco: a longitudinal cohort study.
Authors: Abbadi I; Virology Unit, Viral Hepatitis Laboratory, Institut Pasteur du Maroc, 1 Place Louis Pasteur, 20360, Casablanca, Morocco., Sarih M; Service de Parasitologie et des Maladies Vectorielles, Institut Pasteur du Maroc, Casablanca, Morocco., Majidi H; Ministry of Health and Social Protection, Rabat, Morocco., Redwane S; Direction Régionale de la santé Casablanca-Settat, Observatoire régional de santé, Casablanca, Morocco., Batcho S; Africa Centres for Disease Control and Prevention (Africa CDC), African Union, Addis Ababa, Ethiopia., Abounouh K; Virology Unit, Viral Hepatitis Laboratory, Institut Pasteur du Maroc, 1 Place Louis Pasteur, 20360, Casablanca, Morocco., Aqillouch S; Virology Unit, Viral Hepatitis Laboratory, Institut Pasteur du Maroc, 1 Place Louis Pasteur, 20360, Casablanca, Morocco., Bouddahab O; Virology Unit, Viral Hepatitis Laboratory, Institut Pasteur du Maroc, 1 Place Louis Pasteur, 20360, Casablanca, Morocco., Hilmi S; Virology Unit, Viral Hepatitis Laboratory, Institut Pasteur du Maroc, 1 Place Louis Pasteur, 20360, Casablanca, Morocco., Ainahi A; Hormonology and Tumor Markers Laboratory, Institut Pasteur du Maroc, Casablanca, Morocco., Tajudeen R; Africa Centres for Disease Control and Prevention (Africa CDC), African Union, Addis Ababa, Ethiopia., Fallah MP; Africa Centres for Disease Control and Prevention (Africa CDC), African Union, Addis Ababa, Ethiopia., Kaseya J; Africa Centres for Disease Control and Prevention (Africa CDC), African Union, Addis Ababa, Ethiopia., Maaroufi A; Virology Unit, Viral Hepatitis Laboratory, Institut Pasteur du Maroc, 1 Place Louis Pasteur, 20360, Casablanca, Morocco., Ezzikouri S; Virology Unit, Viral Hepatitis Laboratory, Institut Pasteur du Maroc, 1 Place Louis Pasteur, 20360, Casablanca, Morocco. sayeh.ezzikouri@pasteur.ma.
Source: Scientific reports [Sci Rep] 2026 Apr 24; Vol. 16 (1). Date of Electronic Publication: 2026 Apr 24.
Publication Type: Journal Article
Journal Info: Publisher: Nature Publishing Group Country of Publication: England NLM ID: 101563288 Publication Model: Electronic Cited Medium: Internet ISSN: 2045-2322 (Electronic) Linking ISSN: 20452322 NLM ISO Abbreviation: Sci Rep Subsets: MEDLINE
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  Data: Long-term kinetics of anti-RBD IgG antibodies 16 months after COVID-19 vaccination in Morocco: a longitudinal cohort study.
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  Data: <searchLink fieldCode="AU" term="%22Abbadi+I%22">Abbadi I</searchLink>; Virology Unit, Viral Hepatitis Laboratory, Institut Pasteur du Maroc, 1 Place Louis Pasteur, 20360, Casablanca, Morocco.<br /><searchLink fieldCode="AU" term="%22Sarih+M%22">Sarih M</searchLink>; Service de Parasitologie et des Maladies Vectorielles, Institut Pasteur du Maroc, Casablanca, Morocco.<br /><searchLink fieldCode="AU" term="%22Majidi+H%22">Majidi H</searchLink>; Ministry of Health and Social Protection, Rabat, Morocco.<br /><searchLink fieldCode="AU" term="%22Redwane+S%22">Redwane S</searchLink>; Direction Régionale de la santé Casablanca-Settat, Observatoire régional de santé, Casablanca, Morocco.<br /><searchLink fieldCode="AU" term="%22Batcho+S%22">Batcho S</searchLink>; Africa Centres for Disease Control and Prevention (Africa CDC), African Union, Addis Ababa, Ethiopia.<br /><searchLink fieldCode="AU" term="%22Abounouh+K%22">Abounouh K</searchLink>; Virology Unit, Viral Hepatitis Laboratory, Institut Pasteur du Maroc, 1 Place Louis Pasteur, 20360, Casablanca, Morocco.<br /><searchLink fieldCode="AU" term="%22Aqillouch+S%22">Aqillouch S</searchLink>; Virology Unit, Viral Hepatitis Laboratory, Institut Pasteur du Maroc, 1 Place Louis Pasteur, 20360, Casablanca, Morocco.<br /><searchLink fieldCode="AU" term="%22Bouddahab+O%22">Bouddahab O</searchLink>; Virology Unit, Viral Hepatitis Laboratory, Institut Pasteur du Maroc, 1 Place Louis Pasteur, 20360, Casablanca, Morocco.<br /><searchLink fieldCode="AU" term="%22Hilmi+S%22">Hilmi S</searchLink>; Virology Unit, Viral Hepatitis Laboratory, Institut Pasteur du Maroc, 1 Place Louis Pasteur, 20360, Casablanca, Morocco.<br /><searchLink fieldCode="AU" term="%22Ainahi+A%22">Ainahi A</searchLink>; Hormonology and Tumor Markers Laboratory, Institut Pasteur du Maroc, Casablanca, Morocco.<br /><searchLink fieldCode="AU" term="%22Tajudeen+R%22">Tajudeen R</searchLink>; Africa Centres for Disease Control and Prevention (Africa CDC), African Union, Addis Ababa, Ethiopia.<br /><searchLink fieldCode="AU" term="%22Fallah+MP%22">Fallah MP</searchLink>; Africa Centres for Disease Control and Prevention (Africa CDC), African Union, Addis Ababa, Ethiopia.<br /><searchLink fieldCode="AU" term="%22Kaseya+J%22">Kaseya J</searchLink>; Africa Centres for Disease Control and Prevention (Africa CDC), African Union, Addis Ababa, Ethiopia.<br /><searchLink fieldCode="AU" term="%22Maaroufi+A%22">Maaroufi A</searchLink>; Virology Unit, Viral Hepatitis Laboratory, Institut Pasteur du Maroc, 1 Place Louis Pasteur, 20360, Casablanca, Morocco.<br /><searchLink fieldCode="AU" term="%22Ezzikouri+S%22">Ezzikouri S</searchLink>; Virology Unit, Viral Hepatitis Laboratory, Institut Pasteur du Maroc, 1 Place Louis Pasteur, 20360, Casablanca, Morocco. sayeh.ezzikouri@pasteur.ma.
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