Can Common Viruses Cause Breast Cancer?

I am surprised that viruses are still dismissed as a cause of breast cancer!

There are a number of common viruses that, despite having a connection to breast cancer, are dismissed as causes of the disease. Infectious organisms can cause chronic disease and this creates, if nothing else, a predisposition to cancer. Not too many people are going to argue with this hypothesis. But let be more specific and point out that viruses have multiple consequences.

Just look at these examples: 

  • The HIV virus that causes AIDS can also cause Kaposi’s Sarcoma and central nervous system lymphoma.

  • The HPV, human papilloma virus, can also cause cervical, penile, anal cancers.

  • Hepatitis B and C can cause liver cancer.

  • Helicobacter pylori causes ulcers but also stomach cancers.

  • Epstein-Barr (causing mononucleosis) can cause Burkitt’s lymphoma and nasopharyngeal carcinoma. 

  •  Methylobacterium not as common but now being linked to breast cancer.

Some studies suggest that a virus similar to the mouse mammary tumor virus (MMTV) is associated with breast cancer in humans. 

In North America, Europe and Australia, where the species is common, incidentally where we also have the highest incidence of breast cancer, this virus was detected in 30 to 40% of breast cancer tissue samples. Interestingly, in Asia where the incidence of breast cancer is much lower than in North America, infected samples were many times lower too. Remember, that the development of cancer is a multi-step process with several contributing factors, infections by herpesvirus, polyomavirus, papillomavirus and retrovirus families definitely associate with breast cancer. 

Read more about reducing your breast cancer risk with foods

In my own experience, I’ve found that people who have had mononucleosis (caused by Epstein Barr Virus) have a much higher incidence of all cancers, including breast cancer. So whenever I see Epstein Barr or mononucleosis in patient’s medical history, I immediately start thinking about immune support to prevent cancer. The role of viruses in most common cancers is certainly important, and in my opinion, highly underestimated. Viruses can directly act as catalysts of disease and of course also as triggering co-factors. 

I believe that approximately 30% of cancer has a viral aetiology––in other words, the origin is viral or bacterial. Already, we know that between 15% and 20% of known viruses and bacteria’s cause cancer. This likely explains the random and so-called rampant cases of cancers that don’t seem to have any other obvious causes. 

I propose that by preventing and treating infections properly we may possibly stop or even eliminate many breast cancers.

This article originally appeared on

By Dr. Alexander Mostovoy| November 27, 2017
Categories:  Care

About the Author

Dr. Alexander Mostovoy

Dr. Alexander Mostovoy

Dr. Alexander Mostovoy, HD, DHMS, BCCT is a Homeopathic Doctor and a Board Certified Clinical Thermographer specializing in women’s health issues. He is widely regarded as a leading authority on homeopathic medicine and clinical thermography. His expertise lies in a natural approach to menopause, disease and breast cancer prevention. He is the clinic director of the North York Medical Thermography Centre. He is a frequent guest on many television and radio programs. He also publishes many informative articles in health magazines and is passionately involved in educating women on how to take charge of their own health. For more information please go to Dr. Mostovoy's website

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