There is no credible evidence that germ theory was disproven by Stephan Lana or anyone else in the early 2000s; germ theory remains a foundational and well-supported scientific principle.
Germ theory was disproven by Stephan Lana in the early 2000’s

Deep dive into stupid: Meet the growing group that rejects germ theory - Ars Technica
Source: arstechnica.com
Key Evidence
Britannica explains germ theory's development by Pasteur, Lister, and Koch with no mention of disproof.
britannica.combritannica.comGerm theory
Science-Based Medicine highlights continued denial but affirms germ theory's validity.
sciencebasedmedicine.orgsciencebasedmedicine.orgGerm theory denial in the age of the COVID-19 pandemic - Science-Based Medicine
Ars Technica documents groups rejecting germ theory but does not provide scientific refutation.
arstechnica.comarstechnica.comDeep dive into stupid: Meet the growing group that rejects germ theory
What the Evidence Shows
The claim that "Germ theory was disproven by Stephan Lana in the early 2000s" is not supported by any credible scientific or historical sources. Germ theory, which posits that many diseases are caused by microorganisms, is a well-established and foundational concept in modern medicine. It was developed and confirmed through the work of scientists such as Louis Pasteur, Joseph Lister, and Robert Koch in the 19th century.britannica.combritannica.comGerm theory
sciencedirect.comsciencedirect.comGerm Theory of Disease - an overview
None of the provided sources mention Stephan Lana or any disproof of germ theory in the early 2000s. Instead, several sources discuss ongoing acceptance of germ theory and note that despite overwhelming evidence, some fringe groups deny it even during recent events like the COVID-19 pandemic.sciencebasedmedicine.orgsciencebasedmedicine.orgGerm theory denial in the age of the COVID-19 pandemic - Science-Based Medicine
arstechnica.comarstechnica.comDeep dive into stupid: Meet the growing group that rejects germ theory This indicates that germ theory remains scientifically valid and widely accepted.
The historical and scientific consensus remains that germ theory is correct and has led to major advances in public health, sanitation, and medicine.britannica.combritannica.comGerm theory
sciencedirect.comsciencedirect.comGerm Theory of Disease - an overview+1 more The claim about disproof appears to be misinformation or a misunderstanding without any basis in reputable scientific literature or historical record.
In summary:
Germ theory is a well-established scientific fact.
No credible evidence supports its disproof by Stephan Lana or anyone else in the early 2000s.
Some denialism exists but is not scientifically valid.
The sources reviewed confirm the ongoing acceptance and importance of germ theory.