Animal Experimentation Has Failed

50 Years and No Cure—PETA Explains How to Win the ‘War on Cancer’

What You Can Do

This year marks the 50-year anniversary since then-President Richard Nixon declared a “war on cancer,” flinging open the floodgates to billions of American taxpayer dollars, which poured into research aimed at defeating this deadly disease.

A half-century later, there is still no cure for cancer. Cancer rates remain unchanged, while cancer prevention resources are limited.

What went wrong? How could such a technologically advanced country fail so spectacularly to find a cure for this disease, despite five decades of nearly unwavering focus from expert scientific minds? Simple: animal experimentation.

Cancer Has Won the War on Cancer

In 1971, when Nixon signed the National Cancer Act, which launched the war on cancer, the disease was the second leading cause of death in the U.S.

Fifty years later, cancer is STILL the second leading cause of death in the U.S.

Officials estimate that cancer killed 606,520 Americans in 2020. About 39% of people in the nation can expect a cancer diagnosis at some point in their lives, and despite significant investment in research for cancer therapies, only 67.7% of them will survive for longer than five years after that diagnosis.

All this after 50 years of ineffective, cruel and deadly animal experimentation costing billions of dollars of taxpayer money.

Prevention, Not Animals, Has Brought Down Cancer Rates

The most significant victories in the war on cancer don’t come from a lab. They’re personal preventive measures: quitting cigarette smoking, skipping red and processed meat in favor of a plant-based diet, and having regular checkups for screening. These measures have brought cancer rates down 27% over the past two decades.

Yet only 6% of the budget for the National Cancer Institute (NCI)—the federal agency under the National Institutes of Health that’s leading the war on cancer—was dedicated to prevention in 2019. In fact, the percentage of the NCI’s funds dedicated to cancer prevention and control has stayed relatively stable over the past several years, despite increases in overall budget, most of which goes to research.

Animals Are Not Miniature Humans

In crude attempts to understand how cancer develops and can be treated in humans, experimenters graft human tumor cells to mice, inject the animals with chemicals, or genetically engineer them to have cancer-causing genes, then kill them or allow them to suffer and die slowly.

But cancer drugs developed through animal experimentation fail to get approved 96.6% of the time. Why? The fundamental biological differences between humans and other animals are largely to blame. Other animals are poor stand-ins for humans, plain and simple. No matter the type of experiment, no matter how intricately designed, and regardless of its cost, experimenters haven’t been able to surmount the biological, immunological, and genetic differences between species. It’s even led a former director of the NCI to wave the white flag.

“The history of cancer research has been a history of curing cancer in the mouse,” said former NCI Director Dr. Richard Klausner. “We have cured mice of cancer for decades—and it simply didn’t work in humans.”

Animals are also used to try to determine whether pesticides, food additives, and pharmaceuticals might cause cancer in humans. In each test, hundreds of mice and rats are forced to ingest or inhale chemicals every day for up to two years at a time, causing them nausea, tumors, and death. These tests fail at accurately identifying potential human carcinogens or protecting human health.

There Is a Better Way

To wage a true war on cancer, scientists must increase resources for cancer prevention, eliminate animal experimentation, and shift research money toward cutting-edge, human biology–based tools that show far greater promise of identifying cancer-causing compounds and generating treatments and cures for cancer in humans.

Tools such as cell-based (in vitro) experiments, human-relevant computer models, human-based tissue engineering, cancer organoids, and epidemiology studies hold the promise of more relevant and reliable methods that may actually win the war on cancer.

For example, tumor-on-chip models are being used to study how immune and cancer cells interact with each other. These models can be personalized with cells from human cancer patients and then used to test drugs. The responses of the cells can even be observed in real time.

Scientists and computer programmers are using artificial intelligence to generate profiles of cancer cells to identify markers that may be meaningful for drug discovery and may predict drug responses for individual patients.

What You Can Do

Please sign our petition to the NCI urging it to stop throwing away tax dollars on cruel and useless animal experiments and instead focus on modern, non-animal research methods.


50 Years of Failure: Why We’re Losing the ‘War on Cancer’

Sign Our Petition!

Please Modernize Cancer Research and Testing
Dear Dr. Sharpless:

We, the undersigned, are writing to you today about an area of great importance and shared concern for all of us. But first, we would like to thank you for your service to our nation’s health and your research innovation.

As you know, it has been 50 years since former President Richard Nixon declared a “war on cancer.” Yet despite five decades of effort and billions of taxpayer dollars spent attempting to eradicate the disease, cancer remains the second leading cause of death in the U.S., just as it was in the 1970s.

While personal preventive measures have reduced rates somewhat, the last half-century of effort has produced no cures. This paucity of progress is, in large part, because of a misplaced reliance on animal experimentation, despite the overwhelming evidence that these tests don’t reliability translate to saving human lives.

While animal experimentation has been unproductive, significant progress has been made in the development of non-animal testing methods based in human biology. These methods are more reliable and provide a more relevant system to evaluate human cancer biology, treatment, and prevention. Alarmingly, a shift in our nation’s cancer research investment away from the use of animals and toward these methods has not been prioritized.

We ask that you please do the following:

Reallocate National Institutes of Health intramural and extramural research funding toward animal-free, human-relevant models
Convene or commission an unbiased committee to review the translatability of cancer research and carcinogenicity assessment in animals to human patients
Provide regulators and researchers with opportunities to receive free training and education on the use of human-relevant models
Adopt legislation to create new federal regulations to replace outdated requirements of the lifetime tests on rats and mice for carcinogenicity assessment with rapid, reliable, and human-relevant models
Increase the percentage and amount of federal funding allocated to cancer prevention

Thank you for your time and attention.

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Photo credits: Cancer cell © iStock.com/Marcin Klapczynski, Cancer patient resting © iStock.com/Ridofranz, X-ray © iStock.com/Chinnapong, Test tubes © iStock.com/dusanpetkovic, Smiling child © iStock.com/FatCamera

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