The hepatitis B infection, detected in the 2023 study’s authenticated samples, added another element. Hepatitis B can cause acute liver inflammation and, in chronic infection, progressive liver damage. The combination of genetic susceptibility to liver disease, chronic heavy alcohol use, lead exposure, and a hepatitis B infection creates a plausible account of why Beethoven’s liver failed as severely and as early as it did.
None of this is a diagnosis delivered from a position of certainty. The researchers were careful at every step to distinguish what the data supported from what it could not establish. They did not claim to have solved the cause of his deafness. They did not claim to have identified the definitive cause of his death. They offered a picture that was more detailed and more evidentially grounded than what existed before the study—which is what good historical science does.
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## The Music Made in Silence
It is possible to write about Beethoven’s health without writing about his music, but it would miss something essential about why the health story matters.
The paradox at the center of his life is that the decades during which his hearing deteriorated and eventually disappeared were also the decades during which he produced his most ambitious and enduring work. The Fifth Symphony, with its famous four-note opening motif, was completed in 1808. The Ninth Symphony, with the choral finale setting Friedrich Schiller’s “Ode to Joy,” was completed in 1824, when Beethoven had been deaf for years. He could not hear the premiere of the Ninth—he stood on stage with the orchestra and soloists and had to be turned by a performer to see the audience’s response, because he could not hear the applause.