Peter Heinz Hermann Duesberg (2 December 1936 – 13 January 2026) was a German-American molecular biologist and a professor of molecular and cell biology at the University of California, Berkeley. He is known for his early research into the genetic aspects of cancer. He was a proponent of AIDS denialism, the claim that HIV does not cause AIDS.
Duesberg received acclaim early in his career for research on oncogenes and cancer. With Peter K. Vogt, he reported in 1970 that a cancer-causing virus of birds had extra genetic material compared with non-cancer-causing viruses, hypothesizing that this material contributed to cancer.
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