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  1. Artikel: Pre-Existing Population Immunity and severe acute respiratory syndrome coronavirus 2 Variant Establishment and Dominance Dynamics in the United States: An Ecological Study.

    Ankomah, Pierre O / Siedner, Mark J / Bhattacharyya, Roby P

    Open forum infectious diseases

    2022  Band 9, Heft 12, Seite(n) ofac621

    Abstract: We conducted an ecological analysis of the dynamics of Delta and Omicron establishment and dominance in US states. Omicron became the dominant circulating variant later in states with higher population-level immunity. By contrast, population immunity did ...

    Abstract We conducted an ecological analysis of the dynamics of Delta and Omicron establishment and dominance in US states. Omicron became the dominant circulating variant later in states with higher population-level immunity. By contrast, population immunity did not impact the maximum rate of takeover by Delta or Omicron from prior variants.
    Sprache Englisch
    Erscheinungsdatum 2022-12-20
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 2757767-3
    ISSN 2328-8957
    ISSN 2328-8957
    DOI 10.1093/ofid/ofac621
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  2. Artikel ; Online: Pre-existing population immunity and SARS-CoV-2 variant establishment and dominance dynamics in the United States: An ecological study

    Ankomah, Pierre O. / Siedner, Mark J. / Bhattacharyya, Roby P.

    medRxiv

    Abstract: We conducted an ecological analysis of the dynamics of Delta and Omicron establishment and dominance in U.S. states. Omicron became the dominant circulating variant later in states with higher population-level immunity. By contrast, population immunity ... ...

    Abstract We conducted an ecological analysis of the dynamics of Delta and Omicron establishment and dominance in U.S. states. Omicron became the dominant circulating variant later in states with higher population-level immunity. By contrast, population immunity did not impact the rates of transition from prior variants to either Delta or Omicron.
    Schlagwörter covid19
    Sprache Englisch
    Erscheinungsdatum 2022-07-02
    Verlag Cold Spring Harbor Laboratory Press
    Dokumenttyp Artikel ; Online
    DOI 10.1101/2022.07.01.22277157
    Datenquelle COVID19

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  3. Artikel: Delayed and Attenuated Antibody Responses to Coronavirus Disease 2019 Vaccination With Poor Cross-Variant Neutralization in Solid-Organ Transplant Recipients-A Prospective Longitudinal Study.

    Liew, May Y / Mathews, Josh I / Li, Amy / Singh, Rohan / Jaramillo, Salvador A / Weiss, Zoe F / Bowman, Kathryn / Ankomah, Pierre O / Ghantous, Fadi / Lewis, Gregory D / Neuringer, Isabel / Bitar, Natasha / Lipiner, Taryn / Dighe, Anand S / Kotton, Camille N / Seaman, Michael S / Lemieux, Jacob E / Goldberg, Marcia B

    Open forum infectious diseases

    2023  Band 10, Heft 8, Seite(n) ofad369

    Abstract: Background: Therapeutically immunosuppressed transplant recipients exhibit attenuated responses to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) vaccines. To elucidate the kinetics and variant cross-protection of vaccine-induced ... ...

    Abstract Background: Therapeutically immunosuppressed transplant recipients exhibit attenuated responses to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) vaccines. To elucidate the kinetics and variant cross-protection of vaccine-induced antibodies in this population, we conducted a prospective longitudinal study in heart and lung transplant recipients receiving the SARS-CoV-2 messenger RNA (mRNA) 3-dose vaccination series.
    Methods: We measured longitudinal serum antibody and neutralization responses against the ancestral and major variants of SARS-CoV-2 in SARS-CoV-2-uninfected lung (n = 18) and heart (n = 17) transplant recipients, non-lung-transplanted patients with cystic fibrosis (n = 7), and healthy controls (n = 12) before, during, and after the primary mRNA vaccination series.
    Results: Among healthy controls, strong anti-spike responses arose immediately following vaccination and displayed cross-neutralization against all variants. In contrast, among transplant recipients, after the first 2 vaccine doses, increases in antibody concentrations occurred gradually, and cross-neutralization was completely absent against the Omicron B.1.1.529 variant. However, most (73%) of the transplant recipients had a significant response to the third vaccine dose, reaching levels comparable to those of healthy controls, with improved but attenuated neutralization of immune evasive variants, particularly Beta, Gamma, and Omicron. Responses in non-lung-transplanted patients with cystic fibrosis paralleled those in healthy controls.
    Conclusions: In this prospective, longitudinal analysis of variant-specific antibody responses, lung and heart transplant recipients display delayed and defective responses to the first 2 SARS-CoV-2 vaccine doses but significantly augmented responses to a third dose. Gaps in antibody-mediated immunity among transplant recipients are compounded by decreased neutralization against Omicron variants, leaving many patients with substantially weakened immunity against currently circulating variants.
    Sprache Englisch
    Erscheinungsdatum 2023-08-10
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 2757767-3
    ISSN 2328-8957
    ISSN 2328-8957
    DOI 10.1093/ofid/ofad369
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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    Kategorien

    Über subito bestellen

    Dieser Service ist kostenpflichtig (siehe Lieferbedingungen von subito). Bestellungen, die einen Artikel nebst Supplementary Material umfassen, werden grundsätzlich wie mehrfache Bestellungen bearbeitet. Gebühren fallen in diesen Fällen für jede einzelne Bestellung an.

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