Vaccinated vs unvaccinated: 4 years, 28 million people vaccine mortality data from France (#212)

Merogenomics 176K subscribers

25,579 views Premiered Mar 23, 2026 COVID Updates
🔎 28 million adults. 4 years of follow-up. One question: Did mRNA vaccination change long-term mortality?

A nationwide French study tracked adults aged 18–59 using the country’s full health database system. The result? Lower all-cause mortality in vaccinated individuals, even years later.

But here’s where it gets interesting.

This video breaks down what the data shows, what it doesn’t show, and why statistical design (immortal time bias, healthy vaccinee bias, time-dependent exposure) completely changes how results are interpreted.

📊 What This Video Covers

1️⃣ The Scale of the Study
Population:
*22.7 million vaccinated
*5.9 million unvaccinated

Median follow-up: 45 months

2️⃣ The Core Findings

After adjustments:
*25% lower all-cause mortality (wHR 0.75)
*74% lower hospital COVID mortality (wHR 0.26)
*Strongest association early, gradually attenuating over time (difference b/n vaxxed + unvaxxed smaller over time)
*Lower mortality across cancer, circulatory disease, and external causes

So is this purely vaccine effect? Or partly behavioral and socioeconomic differences?

3️⃣ The Bias Problems

We unpack:
*Healthy survivor selection bias
*Why starting everyone at “day zero” creates fake protection
*How time-dependent exposure models attempt to fix both

This is where most online debates go wrong.

4️⃣ The Bottom Line

The consistent negative association suggests:
*A causal link between mRNA vaccination and excess long-term mortality appears highly unlikely in the young population studied

⏱️ Timestamps:
00:00 – Intro and video title
01:20 – Mortality studies 4 videos background
06:54 – Vaccinated vs unvaccinated: regulatory T-cells
11:43 – Vaccinated vs unvaccinated: France first 6 months mortality
13:00 – Vaccinated vs unvaccinated: cancer studies
13:18 – Vaccinated vs unvaccinated: France mortality by cause
16:20 – IgG4 background videos
17:46 – IgG4 in long COVID