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Effectiveness of mRNA-1273 vaccination against SARS-CoV-2 omicron subvariants BA.1, BA.2, BA.2.12.1, BA.4, and BA.5
Open accessPublished version of a preprint
Abstract
Studies have reported reduced natural SARS-CoV-2 infection- and vaccine-induced neutralization against omicron BA.4/BA.5 compared with earlier omicron subvariants. This test-negative case-control study evaluates mRNA-1273 vaccine effectiveness (VE) against infection and hospitalization with omicron subvariants. The study includes 30,809 SARS-CoV-2 positive and 92,427 SARS-CoV-2 negative individuals aged ≥18 years tested during 1/1/2022-6/30/2022. While 3-dose VE against BA.1 infection is high and wanes slowly, VE against BA.2, BA.2.12.1, BA.4, and BA.5 infection is initially moderate to high (61.0%-90.6% 14-30 days post third dose) and wanes rapidly. The 4-dose VE against infection with BA.2, BA.2.12.1, and BA.4 ranges between 64.3%-75.7%, and is low (30.8%) against BA.5 14-30 days post fourth dose, disappearing beyond 90 days for all subvariants. The 3-dose VE against hospitalization for BA.1, BA.2, and BA.4/BA.5 is 97.5%, 82.0%, and 72.4%, respectively; 4-dose VE against hospitalization for BA.4/BA.5 is 88.5%. Evaluation of the updated bivalent booster is warranted.
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![Fig. 2 Adjusted vaccine effectiveness (VE) and relative vaccine effectiveness (rVE) of mRNA-1273 against infection with omicron subvariants by time since 3rd dose vaccination. Adjusted VE of three doses of mRNA-1273 and adjusted rVE of three versus two doses of mRNA-1273 and their 95% confidence intervals against infection with SARS-CoV-2 omicron subvariants. Sample size for each analysis equals the number of three-dose vaccinated divided by the percentage of three-dose vaccinated. Symbols represent the adjusted vaccine effectiveness or adjusted relative vaccine effectiveness. aWhen the OR or its 95% CI was >1, the VE/rVE or its 95% CI was transformed as ([1/OR] – 1) × 100. bAdjusted for age, sex, race/ethnicity, month of specimen collection, history of SARS-CoV-2 infection, history of SARS-CoV-2 molecular test, number of outpatient and virtual visits, medical center area, and time between second dose and specimen collection date (for three-dose versus two-dose models only). cMedical center area removed from adjustment set in three-dose versus two-dose models due to lack of model convergence. dBA.2 excluding BA.2.12.1. eMedical center area removed from adjustment set in three-dose versus unvaccinated models due to lack of model convergence. CI confidence interval, OR odds ratio, rVE relative vaccine effectiveness, VE vaccine effectiveness.](/paper-figures/4128c7d2157a4a3ea118482009163f20/effectiveness-of-mrna-1273-vaccination-against-sars-cov-2-omicron-subvariants-ba-figure-2.jpg)
![Fig. 3 Adjusted vaccine effectiveness (VE) and relative vaccine effectiveness (rVE) of mRNA-1273 against infection with omicron subvariants by time since 4th dose vaccination. Adjusted VE of four doses of mRNA-1273 and adjusted rVE of four versus three doses of mRNA-1273 and their 95% confidence intervals against infection with SARS-CoV-2 omicron subvariants. Sample size for each analysis equals the number of four-dose vaccinated divided by the percentage of four-dose vaccinated. Symbols represent the adjusted vaccine effectiveness or adjusted relative vaccine effectiveness. aWhen the OR or its 95% CI was >1, the VE/rVE or its 95% CI was transformed as ([1/OR] – 1) × 100. bAdjusted for age, sex, race/ethnicity, month of specimen collection, history of SARS-CoV-2 infection, history of SARS-CoV-2 molecular test, number of outpatient and virtual visits, medical center area, and time between third dose and specimen collection date (for four-dose versus three-dose models only). cBA.2 excluding BA.2.12.1. dMedical center area removed from adjustment set in four-dose versus three-dose models due to lack of model convergence. eMedical center area removed from adjustment set in four-dose versus unvaccinated models due to lack of model convergence. CI confidence interval, OR odds ratio, rVE relative vaccine effectiveness, VE vaccine effectiveness.](/paper-figures/63d96ea2cfa14d88b359c1237783e493/effectiveness-of-mrna-1273-vaccination-against-sars-cov-2-omicron-subvariants-ba-figure-3.jpg)
![Fig. 4 Adjusted vaccine effectiveness (VE) and relative vaccine effectiveness (rVE) of mRNA-1273 against hospitalization for omicron subvariants by time since 3rd or 4th dose vaccination. Adjusted VE of 3 and four doses of mRNA-1273 and adjusted rVE of 3 versus two doses and 4 versus three doses of mRNA-1273 and their 95% confidence intervals against hospitalization for SARS-CoV-2 omicron subvariants. Sample size for each analysis equals the number of three-dose vaccinated divided by the percentage of three-dose vaccinated for the three-dose models, and is equal to the number of four-dose vaccinated divided by the percentage of four-dose vaccinated for the four-dose models. aAdjusted for age, sex, race/ethnicity, month of specimen collection, history of SARS-CoV-2 infection, history of SARS-CoV-2 molecular test, number of outpatient and virtual visits, and time between second/third dose and specimen collection date (for three-dose versus two-dose and four-dose versus three-dose models, respectively). Medical center area dropped from adjustment set due to lack of model convergence. Symbols represent the adjusted vaccine effectiveness or adjusted relative vaccine effectiveness. bWhen the OR or its 95% CI was >1, the VE/rVE or its 95% CI was transformed as ([1/OR] – 1) × 100. cHistory of SARS-CoV-2 infection dropped from adjustment set in four-dose versus three-dose models due to lack of model convergence. CI confidence interval, OR odds ratio, rVE relative vaccine effectiveness, VE vaccine effectiveness.](/paper-figures/b51afe91b33b4bf5aabd5370c6677c0f/effectiveness-of-mrna-1273-vaccination-against-sars-cov-2-omicron-subvariants-ba-figure-4.jpg)
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“Of three studies assessing VE against infection/symptomatic disease during both BA.2 and BA.4/BA.5 periods, all showed similar VE estimates or estimates with overlapping 95 % confidence intervals against both subvariants [25,26,31-33].”
From Assessing COVID-19 vaccine effectiveness against Omicron subvariants: Report from a meeting of the World Health Organization (2023) · cites this paper as [33]
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“Eight studies assessed VE of primary series or first booster dose vaccination separately for at least two different Omicron subvariants (six assessed VE of both primary series and booster dose vaccination and two assessed VE of a booster dose only, Tables 1 and 2) [21,24-26,28-33].”
From Assessing COVID-19 vaccine effectiveness against Omicron subvariants: Report from a meeting of the World Health Organization (2023) · cites this paper as [33]
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“Among 4 studies that compared VE against outcomes of SARS-CoV-2 infection and/or symptomatic COVID-19 disease between BA.1 and BA.2, all showed lower VE against BA.2 [26,29,31,33].”
From Assessing COVID-19 vaccine effectiveness against Omicron subvariants: Report from a meeting of the World Health Organization (2023) · cites this paper as [33]
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Metadata
- Authors
- Tseng, H. F., Ackerson, B. K., Bruxvoort, K. J., Sy, L. S., Tubert, J. E., Lee, G. S., Ku, J. H., Florea, A., Luo, Y., Qiu, S., Choi, S. K., Takhar, H. S., Aragones, M., Paila, Y. D., Chavers, S., Talarico, C. A., & Qian, L.
- Affiliations
- Kaiser Permanente (US)
- AstraZeneca (United States) (US)
- Corresponding author
- Tseng, Hung Fu
- ORCID
- Venue
- Nature Communications
- Published
- 2023-01-12
- Volume
- 14
- Issue
- 1
- Pages
- 189-189
- ISSN
- 2041-1723 (ISSN-L)
- PMC
- PMC9836332
- OpenAlex
- W4315779712
- Cited by
- 105
- References
- 44
- Citations by year
- 2026: 5 · 2025: 18 · 2024: 33 · 2023: 46
- FWCI
- 20.99
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Locations
- Nature Communications (publishedVersion, cc-by)
- medRxiv (acceptedVersion)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- RePEc: Research Papers in Economics (submittedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Funders
- Moderna, Inc.
- Topics
- Health Sciences › Medicine › Infectious Diseases › SARS-CoV-2 and COVID-19 Research
- Physical Sciences › Mathematics › Modeling and Simulation › COVID-19 epidemiological studies
- Health Sciences › Medicine › Infectious Diseases › COVID-19 Clinical Research Studies
- Keywords
- mRNA-1273 vaccine, SARS-CoV-2 Omicron subvariants, vaccine effectiveness, BA.1, BA.2, BA.2.12.1, BA.4, BA.5, COVID-19 infection, hospitalization, waning immunity, bivalent booster, neutralizing antibodies
- MeSH terms
- COVID-19, SARS-CoV-2, 2019-nCoV Vaccine mRNA-1273, Adolescent, Adult, Humans, Vaccination, Case-Control Studies
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