Cited by 185SARS-CoV-2 and COVID-19 ResearchVaccine Coverage and HesitancyCOVID-19 epidemiological studies

Waning of vaccine effectiveness against moderate and severe covid-19 among adults in the US from the VISION network: test negative, case-control study

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Ferdinands, Jill M, Rao, Suchitra, Dixon, Brian E, Mitchell, Patrick K, DeSilva, Malini B, Irving, Stephanie A, Lewis, Ned, Natarajan, Karthik +32 more·2022·BMJ

Abstract

Objective: To estimate the effectiveness of mRNA vaccines against moderate and severe covid-19 in adults by time since second, third, or fourth doses, and by age and immunocompromised status. Design: Test negative case-control study. Setting: Hospitals, emergency departments, and urgent care clinics in 10 US states, 17 January 2021 to 12 July 2022. Participants: 893 461 adults (≥18 years) admitted to one of 261 hospitals or to one of 272 emergency department or 119 urgent care centers for covid-like illness tested for SARS-CoV-2. Main outcome measures: The main outcome was waning of vaccine effectiveness with BNT162b2 (Pfizer-BioNTech) or mRNA-1273 (Moderna) vaccine during the omicron and delta periods, and the period before delta was dominant using logistic regression conditioned on calendar week and geographic area while adjusting for age, race, ethnicity, local virus circulation, immunocompromised status, and likelihood of being vaccinated. Results: 45 903 people admitted to hospital with covid-19 (cases) were compared with 213 103 people with covid-like illness who tested negative for SARS-CoV-2 (controls), and 103 287 people admitted to emergency department or urgent care with covid-19 (cases) were compared with 531 168 people with covid-like illness who tested negative for SARS-CoV-2. In the omicron period, vaccine effectiveness against covid-19 requiring admission to hospital was 89% (95% confidence interval 88% to 90%) within two months after dose 3 but waned to 66% (63% to 68%) by four to five months. Vaccine effectiveness of three doses against emergency department or urgent care visits was 83% (82% to 84%) initially but waned to 46% (44% to 49%) by four to five months. Waning was evident in all subgroups, including young adults and individuals who were not immunocompromised; although waning was morein people who were immunocompromised. Vaccine effectiveness increased among most groups after a fourth dose in whom this booster was recommended. Conclusions: Effectiveness of mRNA vaccines against moderate and severe covid-19 waned with time after vaccination. The findings support recommendations for a booster dose after a primary series and consideration of additional booster doses.

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  • Boosting by BNT162b2 or CoronaVac restores strong protection against hospitalization and death, but the incremental effectiveness of BNT162b2 boosters against such outcomes waned over 4-6 months for adults and the elderly.

    “Further, although boosting by BNT162b2 or CoronaVac restores strong protection against hospitalization and death33–35, the incremental effectiveness of BNT162b2 boosters against such outcomes waned over the course of 4–6 months34 for both adults and the elderly36.”

    From Real-world COVID-19 vaccine effectiveness against the Omicron BA.2 variant in a SARS-CoV-2 infection-naive population (2023) · cites this paper as [36]

    The Results (Vaccine effectiveness; Vaccine effectiveness in subgroups, page not provided) report that protection against hospital admission rose after a third mRNA dose and waned by four to five months, including in adults aged 65 or older. The paper includes BNT162b2, but it does not establish waning protection against death or evaluate CoronaVac; its reported vaccine effectiveness is not specifically the incremental effectiveness of a booster relative to two doses. (LLM, conf=0.88)

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  • Vaccine effectiveness declines over time, as shown in several observational studies.

    “This led to a decline in vaccine effectiveness (VE) over time, as shown in several observational studies [2, 3].”

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Authors
Ferdinands, J. M., Rao, S., Dixon, B. E., Mitchell, P. K., DeSilva, M. B., Irving, S. A., Lewis, N., Natarajan, K., Stenehjem, E., Grannis, S. J., Han, J., McEvoy, C., Ong, T. C., Naleway, A. L., Reese, S. E., Embi, P. J., Dascomb, K., Klein, N. P., Griggs, E. P., Liao, I.-C., Yang, D.-H., Fadel, W. F., Grisel, N., Goddard, K., Patel, P., Murthy, K., Birch, R., Valvi, N. R., Arndorfer, J., Zerbo, O., Dickerson, M., Raiyani, C., Williams, J., Bozio, C. H., Blanton, L., Link-Gelles, R., Barron, M. A., Gaglani, M., Thompson, M. G., & Fireman, B.
Affiliations
  • Centers for Disease Control and Prevention (US)
  • University of Colorado Anschutz (US)
  • Regenstrief Institute (US)
  • Westat (United States) (US)
  • HealthPartners (US)
  • Kaiser Permanente (US)
  • NewYork–Presbyterian Hospital (US)
  • Intermountain Healthcare (US)
  • Columbia University Irving Medical Center (US)
  • Baylor Scott & White Medical Center - Temple (US)
Corresponding author
Ferdinands, Jill M
Venue
BMJ
Publisher
BMJ
Published
2022-10-03
Volume
379
Pages
e072141
ISSN
1756-1833 (ISSN-L)
OpenAlex
W4300863078
Cited by
185
References
30
Citations by year
2026: 5 · 2025: 23 · 2024: 63 · 2023: 88 · 2022: 5
FWCI
21.96
Type
journal article
Language
en
Open access
Locations
  • BMJ (publishedVersion, cc-by-nc)
  • PubMed Central (publishedVersion, cc-by-nc)
  • PubMed (publishedVersion)
  • IUScholarWorks (Indiana University) (submittedVersion, cc-by-nc)
Funders
National Center for Immunization and Respiratory Diseases
Topics
  • Health Sciences › Medicine › Infectious Diseases › SARS-CoV-2 and COVID-19 Research
  • Social Sciences › Health › Vaccine Coverage and Hesitancy
  • Physical Sciences › Mathematics › Modeling and Simulation › COVID-19 epidemiological studies
Keywords
waning vaccine effectiveness, COVID-19 pandemic, SARS-CoV-2, mRNA vaccines, BNT162b2, mRNA-1273, booster vaccination, immunocompromised patients, hospitalization, emergency department visits, Omicron variant, Delta variant, adults, test-negative case-control, COVID-19 vaccination
MeSH terms
COVID-19, SARS-CoV-2, Vaccine Efficacy, BNT162 Vaccine, Humans, Case-Control Studies, Young Adult

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