Dr. Beata Halassy, a virologist at the University of Zagreb, treated her own recurrent breast cancer with oncolytic virotherapy (OVT) using lab-grown viruses.
In 2020, after her second recurrence of cancer following a mastectomy, Halassy opted to administer an unproven OVT treatment in place of chemotherapy.
Drawing on her experience with viruses, she injected her tumour with two types: a measles virus and a vesicular stomatitis virus (VSV), both of which are known to attack cancer cells and stimulate immune responses.
Over two months, Halassy administered the treatment under monitoring by her oncologists. The tumour shrank significantly, detached from surrounding muscle and skin, and was later surgically removed.
Analysis showed it was infiltrated with immune cells, suggesting the treatment had activated her immune system against the cancer. Halassy has remained cancer-free since.
Despite her results, publishing her report faced resistance due to ethical concerns over self-experimentation. Experts caution that such cases could encourage others to attempt unproven treatments outside of clinical oversight.
However, Halassy felt her findings could contribute to OVT research and eventually secured publication in Vaccines. She now plans to research OVT for treating cancer in animals, funded by a recent grant.
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