Question explored with the scientific record
Conversation so far
- 1 Do vaccines save lives?
- 2 Does covid vaccine cause excess deaths?
Answered on this page ↓
Does covid vaccine cause excess deaths?
The honest answer: the evidence is split, and the split tracks the study design, not the vaccine.
The strongest signal for harm comes from whole-population data. In England, all-cause and non-COVID death odds among the unvaccinated started about 2 to 2.5 times higher than the vaccinated, then the gap closed and non-COVID mortality stayed relatively high among the vaccinated through May 2023 [2][4][6]. A US county analysis found each unit of vaccine uptake tied to higher 2022 and 2023 excess mortality, with 2022 excess at 13.8% versus 7.7% assuming zero uptake [3]. A 31-country European analysis found higher 2021 uptake tracked with higher monthly 2022 excess mortality [8]. An Australian re-analysis argued a published 51% all-cause mortality benefit implies an implausible 121% excess death rate in the unvaccinated [1].
The strongest signal against harm comes from individual-level cohorts. Norway's 4.6 million adults showed fully vaccinated all-cause mortality at roughly 0.4 times the unvaccinated across all age bands [5]. Hungary's 6.4 million adults found all six vaccines cut all-cause mortality after adjusting for healthy-vaccinee bias [7]. A Danish heart-failure cohort found lower 90-day mortality after mRNA vaccination [10].
| Design | Finding | What it can and cannot show |
|---|---|---|
| England ONS, monthly | Non-COVID deaths stayed high among vaccinated late [2][4] | Ecological; no individual confounders |
| US counties, 3,000+ | More uptake, more 2022-23 excess deaths [3] | Ecological; cannot prove causation |
| Norway, 4.6M adults | Vaccinated mortality ~0.4x unvaccinated [5] | Individual data; healthy-vaccinee bias possible |
| Hungary, 6.4M adults | All six vaccines cut all-cause deaths [7] | Adjusted for healthy-vaccinee bias |
| Japan, two cities | Higher mortality at 5+ doses, ages 20-64 [9] | Exploratory; confounding by indication |
The pattern is real and unresolved. Ecological studies point one way; individual cohorts point the other. Neither design settles it. The vaccinated-versus-unvaccinated individual cohort with long follow-up and hard endpoints is the study that would settle it, and it is not in front of me.
My call: the evidence does not establish that COVID-19 vaccines caused population-level excess deaths, and it does not clear them either. The honest verdict is not clear, and the studies that could settle it are the ones missing. Confidence: low.
Sources used 10
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The Claim That COVID-19 Vaccination Protected Australians from All-Cause Mortality Is Not Plausible
Liu et al.'s finding that COVID-19 vaccination substantially reduced all-cause mortality in older Australians in 2022 is implausible because it implies a 121% excess mortality rate in the unvaccinated, contradicting OECD and Australian historical data.
DOI: 10.71189/jim/2026/v02n03a11 -
The temporal protection and declining health of the COVID-19 vaccinated in England: A 26-month comparison of the mortality involving and not involving COVID-19 among vaccinated vs. unvaccinated
Using English monthly age-standardized mortality data from Apr 2021 to May 2023, the study finds that unvaccinated individuals had initially higher all-cause and non-COVID mortality, that vaccinated individuals showed temporary protection between Jul 2021 and Jan 2022, and that …
DOI: 10.12688/f1000research.160980.1 -
Why COVID-19 vaccination cannot be ruled out as an explanation for all-cause excess mortality in the pandemic’s aftermath: A population-level study of over 3,000 US counties with over 320 million people
A US county-level study found positive associations between per-capita COVID-19 vaccine uptake and all-cause excess mortality in 2022 and 2023, even when adjusting for lagged mortality, but the design cannot establish causation.
DOI: 10.12688/f1000research.177279.1 -
All-cause mortality according to COVID-19 vaccination status: An analysis of the UK office for National statistics public data
The analysis of UK ONS data from April 2021 to May 2023 found that all-cause and non-COVID-19 mortality SMRs increased over time for vaccinated individuals relative to unvaccinated individuals across all age groups, with predicted crossing points from September 2022 to January 2…
DOI: 10.12688/f1000research.154058.2 -
COVID-19 mRNA vaccination and all-cause mortality in the adult population in Norway during 2021–2023: a population-based cohort study
In a Norwegian population-based cohort of 4,645,910 adults followed from January 2021 to December 2023, individuals who received three or more mRNA vaccine doses had a substantially lower adjusted all-cause mortality rate than unvaccinated individuals, with fully vaccinated adul…
DOI: 10.1136/bmjph-2024-001859 -
Mortality involving and not involving COVID-19 among vaccinated vs. unvaccinated in England between Apr 21 and May 23
England Apr 2021-May 2023: unvaccinated had initially ~2-2.5 times higher all-cause and non-COVID-19 mortality odds than vaccinated; later non-COVID-19 mortality remained relatively high among vaccinated, interpreted as temporary protection and possible long-term harm.
DOI: 10.12688/f1000research.160980.5 -
Effectiveness of COVID-19 Vaccination in Preventing All-Cause Mortality among Adults during the Third Wave of the Epidemic in Hungary: Nationwide Retrospective Cohort Study
In a nationwide retrospective cohort of 6.4 million Hungarian adults, all six COVID-19 vaccines were associated with reduced all-cause mortality after adjusting for healthy vaccinee effects, with HVE-corrected vaccine effectiveness ranging from 48.7% for Pfizer-BioNTech to 75.4%…
DOI: 10.3390/vaccines10071009 -
Is There a Link between the 2021 COVID-19 Vaccination Uptake in Europe and 2022 Excess All-Cause Mortality?
Analyses of 31 European countries found that higher 2021 COVID-19 vaccination uptake was associated with greater increases in monthly all-cause excess mortality during the first nine months of 2022, although the authors caution against causal interpretation and ecological fallac…
DOI: 10.21276/apjhs.2023.10.1.6 -
Age-specific patterns of all-cause mortality across COVID-19 booster dose groups in two Japanese municipalities: an exploratory analysis
Exploratory analysis of Japanese municipal registry data found lower all-cause mortality among highly vaccinated adults aged 65-89 years but higher all-cause mortality among adults aged 20-49 years with ≥5 doses and those aged 50-64 with six doses, with causality unestablished.
DOI: 10.3389/fpubh.2026.1795437 -
Risk of worsening heart failure and all-cause mortality following mRNA COVID-19 vaccination in patients with heart failure: a Danish nationwide real-world safety study
In a nationwide Danish cohort of 101,786 patients with heart failure, SARS-CoV-2 mRNA vaccination was associated with a lower 90-day all-cause mortality risk compared with a matched 2019 unvaccinated cohort and with no difference in worsening heart failure, myocarditis, or venou…
DOI: 10.1093/eurheartj/ehac544.881