A friend asked me if I’d like to return to the pre-COVID era, to go back to 2019. After a moment of thought, I replied, no, I absolutely don’t want to go back to 2019!
Why?
Because COVID-1984 opened my eyes to a lot of stuff I hadn't previously seen. It was like swallowing a pile of red pills.

Terrain theory empowers us—strengthen your body’s balance, and no germ can take hold, unlike germ theory’s fear-driven war on microbes.
— Antoine Béchamp, 19th-century French physiologist
In a nutshell
Germ theory is the idea that germs can make us sick when they get inside our bodies. When they enter our bodies, they can multiply, cause infections and lead to various symptoms and illnesses.
Terrain theory is the idea that whether or not we get sick depends more on our body's inner environment than on the germs themselves. Just like a garden needs healthy soil to grow strong plants, our bodies need a healthy 'terrain'.
Germ theory’s obsession with killing pathogens ignores why some stay healthy despite exposure—terrain theory explains the body’s resilience.
— Claude Bernard, French physiologist and homeostasis pioneer
In other words, germ theory is about disease coming from from invisible forces outside the body, while terrain theory (or cellular theory) is about disease coming from unhealthy cells inside the body.

It's a paradigm shift in how we approach wellbeing and I have found terrain theory to be far more convincing and predictable.
Pasteur’s germ theory oversimplifies disease—terrain theory sees the whole ecosystem, where a healthy gut fends off illness naturally.
— Elie Metchnikoff, Nobel Prize-winning Russian immunologist
However, germ theory is the bread and butter of the medical establishment and has dominated the medical field for over a century. It is very lucrative because it operates according to the following formula:
- single cause (SARS-CoV-2)
- single disease (COVID-19)
- single solution (vaccine)
Terrain theory suggests that numerous causes can trigger various expressions of illness, meaning that multiple solutions are possible, making diagnosis challenging and not particularly lucrative.
For example, the following can trigger illness:
- lack of sleep
- stress
- poor diet
- poor fitness
- physical injury
- toxins
- radiation
Clearly, it is easier to ignore all of this and simply prescribe medicine from the pharmacy, treating symptoms rather than the root cause. 💸
Germ theory’s reductionism fails when healthy people dodge epidemics—terrain theory credits the body’s inner strength, not luck.
— Rudolf Virchow, German pathologist and cellular theory founder
🎙️ Podcast episode
Andrew Kaufman is a doctor I greatly admire.
His calm and simple way of explaining things had a profound impact on me and is the main reason I changed my opinion on germ theory.