Large French Study Links mRNA COVID-19 Vaccination to 25% Reduction in Long-Term Mortality
核心洞察
A comprehensive French study of nearly 30 million adults aged 18-59 found that mRNA COVID-19 (搜索) vaccination was associated with a 25% lower risk of all-cause mortality over four years.
Vaccinated individuals showed a 74% lower risk of dying from COVID-19 (搜索) in hospitals compared to unvaccinated adults, with the strongest protective effect occurring within the first six to nine months post-vaccination.
The mortality benefit persisted despite vaccinated individuals being older and having higher rates of chronic conditions like cardiovascular disease (搜索) and cancer (搜索).
A large-scale French study published in JAMA Network Open has revealed that adults aged 18 to 59 who received at least one dose of an mRNA COVID-19 vaccine experienced significantly lower mortality over four years compared with those who remained unvaccinated. The research analyzed health data from over 28 million people, making it one of the most comprehensive assessments to date of the long-term impacts of COVID-19 (搜索) vaccination in younger and middle-aged populations.
Substantial Reduction in All-Cause Mortality
The study examined data from almost 30 million adults between 2021 and 2025, with approximately 23 million receiving at least one vaccine dose after France began its mass vaccination campaign in mid-2021, while 6 million remained unvaccinated. Most participants received mRNA vaccines from Moderna or Pfizer/BioNTech (搜索).
Individuals who received their first mRNA vaccine dose between May 1 and October 31, 2021, had an all-cause mortality rate of 0.4% during a 45-month follow-up period. In contrast, the mortality rate among unvaccinated individuals in the same age group was 0.6%. After adjusting for demographic and clinical differences, investigators reported a 25% lower risk of all-cause death among vaccinated participants.
This finding was particularly noteworthy because vaccinated individuals tended to be older and had higher rates of chronic conditions such as cardiovascular disease (搜索), cancer (搜索), and respiratory illnesses (搜索)—factors that would typically increase mortality risk.
Dramatic Reduction in COVID-19 Hospital Deaths
The study reported substantial differences in COVID-19 (搜索)-related outcomes. Vaccinated adults had a 74% lower risk of dying in hospital from COVID-19 compared with those who were not vaccinated. The protective effect was most pronounced in the first six to nine months following vaccination, a trend the authors attributed to declining COVID-19 mortality in both groups and changes in viral circulation patterns over time.
Socioeconomic Factors and Study Limitations
The analysis identified several socioeconomic and behavioral distinctions between vaccinated and unvaccinated individuals. Vaccinated people tended to have higher socioeconomic status and better access to healthcare services, factors that may partially account for the mortality differences. Despite these variables, the mortality gap remained significant even after the exclusion of deaths caused by trauma or accidents.
Researchers emphasized that unmeasured behavioral factors, such as differences in health-seeking behavior, could not be fully accounted for and may have influenced outcomes. The researchers noted that while the study demonstrates a strong association, it alone cannot prove that vaccination directly caused the lower death rate, as the difference may be due to the vaccine's protection or to other factors such as differences in age, lifestyle, or socio-economic background.
The study revealed that vaccines did not increase the risk of death, with the unvaccinated group showing approximately 50% higher overall mortality compared to the vaccinated population over the four-year follow-up period.