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This scientist treated her own cancer with viruses she grew in the lab

NATURE – A scientist who successfully treated her own breast cancer by injecting the tumour with lab-grown viruses has sparked discussion about the ethics of self-experimentation.

Beata Halassy discovered in 2020, aged 49, that she had breast cancer at the site of a previous mastectomy. It was the second recurrence there since her left breast had been removed, and she couldn’t face another bout of chemotherapy.

Halassy, a virologist at the University of Zagreb, studied the literature and decided to take matters into her own hands with an unproven treatment.

A case report published in Vaccines in August outlines how Halassy self-administered a treatment called oncolytic virotherapy (OVT) to help treat her own stage 3 cancer. She has now been cancer-free for four years.

In choosing to self-experiment, Halassy joins a long line of scientists who have participated in this under-the-radar, stigmatized and ethically fraught practice. “It took a brave editor to publish the report,” says Halassy.

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“Halassy felt a responsibility to publish her findings. But she received more than a dozen rejections from journals — mainly, she says, because the paper, co-authored with colleagues, involved self-experimentation.”

Up-and-coming therapy

Most OVT clinical trials so far have been in late-stage, metastatic cancer, but in the past few years they have been directed towards earlier-stage disease.

One OVT, called T-VEC, has been in approved in the United States to treat metastatic melanoma, but there are as yet no OVT agents approved to treat breast cancer of any stage, anywhere in the world.

Halassy stresses that she isn’t a specialist in OVT, but her expertise in cultivating and purifying viruses in the laboratory gave her the confidence to try the treatment.

She chose to target her tumour with two different viruses consecutively — a measles virus followed by a vesicular stomatitis virus (VSV) …

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