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Nilles EJ, de St Aubin M, Dumas D, Duke W, Etienne MC, Abdalla G, Jarolim P, Oasan T, Garnier S, Iihoshi N, Lopez B, de la Cruz L, Puello YC, Baldwin M, Roberts KW, Peña F, Durski K, Sanchez IM, Gunter SM, Kneubehl AR, Murray KO, Lino A, Strobel S, Baez AA, Lau CL, Kucharski A, Gutiérrez EZ, Skewes-Ramm R, Vasquez M, Paulino CT. Monitoring Temporal Changes in SARS-CoV-2 Spike Antibody Levels and Variant-Specific Risk for Infection, Dominican Republic, March 2021-August 2022. Emerg Infect Dis 2023; 29:723-733. [PMID: 36848869 PMCID: PMC10045678 DOI: 10.3201/eid2904.221628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2023] Open
Abstract
To assess changes in SARS-CoV-2 spike binding antibody prevalence in the Dominican Republic and implications for immunologic protection against variants of concern, we prospectively enrolled 2,300 patients with undifferentiated febrile illnesses in a study during March 2021-August 2022. We tested serum samples for spike antibodies and tested nasopharyngeal samples for acute SARS-CoV-2 infection using a reverse transcription PCR nucleic acid amplification test. Geometric mean spike antibody titers increased from 6.6 (95% CI 5.1-8.7) binding antibody units (BAU)/mL during March-June 2021 to 1,332 (95% CI 1,055-1,682) BAU/mL during May-August 2022. Multivariable binomial odds ratios for acute infection were 0.55 (95% CI 0.40-0.74), 0.38 (95% CI 0.27-0.55), and 0.27 (95% CI 0.18-0.40) for the second, third, and fourth versus the first anti-spike quartile; findings were similar by viral strain. Combining serologic and virologic screening might enable monitoring of discrete population immunologic markers and their implications for emergent variant transmission.
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Nilles EJ, Paulino CT, de St Aubin M, Restrepo AC, Mayfield H, Dumas D, Finch E, Garnier S, Etienne MC, Iselin L, Duke W, Jarolim P, Oasan T, Yu J, Wan H, Peña F, Iihoshi N, Abdalla G, Lopez B, Cruz LDL, Henríquez B, Espinosa-Bode A, Puello YC, Durski K, Baldwin M, Baez AA, Merchant RC, Barouch DH, Skewes-Ramm R, Gutiérrez EZ, Kucharski A, Lau CL. SARS-CoV-2 seroprevalence, cumulative infections, and immunity to symptomatic infection - A multistage national household survey and modelling study, Dominican Republic, June-October 2021. Lancet Reg Health Am 2022; 16:100390. [PMID: 36408529 PMCID: PMC9642112 DOI: 10.1016/j.lana.2022.100390] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 09/26/2022] [Accepted: 10/19/2022] [Indexed: 11/10/2022]
Abstract
Background Population-level SARS-CoV-2 immunological protection is poorly understood but can guide vaccination and non-pharmaceutical intervention priorities. Our objective was to characterise cumulative infections and immunological protection in the Dominican Republic. Methods Household members ≥5 years were enrolled in a three-stage national household cluster serosurvey in the Dominican Republic. We measured pan-immunoglobulin antibodies against the SARS-CoV-2 spike (anti-S) and nucleocapsid glycoproteins, and pseudovirus neutralising activity against the ancestral and B.1.617.2 (Delta) strains. Seroprevalence and cumulative prior infections were weighted and adjusted for assay performance and seroreversion. Binary classification machine learning methods and pseudovirus neutralising correlates of protection were used to estimate 50% and 80% protection against symptomatic infection. Findings Between 30 Jun and 12 Oct 2021 we enrolled 6683 individuals from 3832 households. We estimate that 85.0% (CI 82.1-88.0) of the ≥5 years population had been immunologically exposed and 77.5% (CI 71.3-83) had been previously infected. Protective immunity sufficient to provide at least 50% protection against symptomatic SARS-CoV-2 infection was estimated in 78.1% (CI 74.3-82) and 66.3% (CI 62.8-70) of the population for the ancestral and Delta strains respectively. Younger (5-14 years, OR 0.47 [CI 0.36-0.61]) and older (≥75-years, 0.40 [CI 0.28-0.56]) age, working outdoors (0.53 [0.39-0.73]), smoking (0.66 [0.52-0.84]), urban setting (1.30 [1.14-1.49]), and three vs no vaccine doses (18.41 [10.69-35.04]) were associated with 50% protection against the ancestral strain. Interpretation Cumulative infections substantially exceeded prior estimates and overall immunological exposure was high. After controlling for confounders, markedly lower immunological protection was observed to the ancestral and Delta strains across certain subgroups, findings that can guide public health interventions and may be generalisable to other settings and viral strains. Funding This study was funded by the US CDC.
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Affiliation(s)
- Eric J Nilles
- Division of Global Emergency Care and Humanitarian Studies, Brigham and Womens Hospital, Boston, MA, USA.,Harvard Medical School, Boston, MA, USA.,Infectious Diseases and Epidemics Program, Harvard Humanitarian Initiative, Cambridge, MA, USA
| | | | - Michael de St Aubin
- Division of Global Emergency Care and Humanitarian Studies, Brigham and Womens Hospital, Boston, MA, USA.,Infectious Diseases and Epidemics Program, Harvard Humanitarian Initiative, Cambridge, MA, USA
| | | | - Helen Mayfield
- School of Public Health, University of Queensland, Brisbane, Australia
| | - Devan Dumas
- Division of Global Emergency Care and Humanitarian Studies, Brigham and Womens Hospital, Boston, MA, USA.,Infectious Diseases and Epidemics Program, Harvard Humanitarian Initiative, Cambridge, MA, USA
| | - Emilie Finch
- Department of Infectious Disease Epidemiology, London School of Hygiene & Tropical Medicine, London, UK
| | - Salome Garnier
- Division of Global Emergency Care and Humanitarian Studies, Brigham and Womens Hospital, Boston, MA, USA.,Infectious Diseases and Epidemics Program, Harvard Humanitarian Initiative, Cambridge, MA, USA.,Harvard University, Cambridge, MA, USA
| | - Marie Caroline Etienne
- Division of Global Emergency Care and Humanitarian Studies, Brigham and Womens Hospital, Boston, MA, USA
| | | | - William Duke
- Pedro Henríquez Ureña National University, Santo Domingo, Dominican Republic
| | - Petr Jarolim
- Division of Global Emergency Care and Humanitarian Studies, Brigham and Womens Hospital, Boston, MA, USA.,Harvard Medical School, Boston, MA, USA
| | - Timothy Oasan
- Division of Global Emergency Care and Humanitarian Studies, Brigham and Womens Hospital, Boston, MA, USA
| | - Jingyou Yu
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA
| | - Huahua Wan
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA
| | - Farah Peña
- Ministry of Health and Social Assistance, Santo Domingo, Dominican Republic
| | - Naomi Iihoshi
- Division of Global Emergency Care and Humanitarian Studies, Brigham and Womens Hospital, Boston, MA, USA
| | - Gabriela Abdalla
- Division of Global Emergency Care and Humanitarian Studies, Brigham and Womens Hospital, Boston, MA, USA
| | - Beatriz Lopez
- Centers for Disease Control and Prevention, Central America Regional Office, Guatemala City, Guatemala
| | - Lucia de la Cruz
- Ministry of Health and Social Assistance, Santo Domingo, Dominican Republic
| | - Bernarda Henríquez
- Ministry of Health and Social Assistance, Santo Domingo, Dominican Republic
| | - Andres Espinosa-Bode
- Centers for Disease Control and Prevention, Central America Regional Office, Guatemala City, Guatemala
| | | | - Kara Durski
- Division of Global Emergency Care and Humanitarian Studies, Brigham and Womens Hospital, Boston, MA, USA
| | - Margaret Baldwin
- Division of Global Emergency Care and Humanitarian Studies, Brigham and Womens Hospital, Boston, MA, USA.,Infectious Diseases and Epidemics Program, Harvard Humanitarian Initiative, Cambridge, MA, USA
| | - Amado Alejandro Baez
- Ministry of Health and Social Assistance, Santo Domingo, Dominican Republic.,Pedro Henríquez Ureña National University, Santo Domingo, Dominican Republic
| | - Roland C Merchant
- Department of Emergency Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Dan H Barouch
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA
| | - Ronald Skewes-Ramm
- Ministry of Health and Social Assistance, Santo Domingo, Dominican Republic
| | - Emily Zielinski Gutiérrez
- Centers for Disease Control and Prevention, Central America Regional Office, Guatemala City, Guatemala
| | - Adam Kucharski
- Department of Infectious Disease Epidemiology, London School of Hygiene & Tropical Medicine, London, UK
| | - Colleen L Lau
- School of Public Health, University of Queensland, Brisbane, Australia
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