Be aware of 6 viruses which are known to be human carcinogen

These carcinogens come from different virus families; they also have different genomes and life cycles.

However, fortunately, only some people who are infected with those viruses can be linked to cancers.

1. Hepatitis C virus

 
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Hepatitis C virus is a kind of virus which is the cause of both acute and chronic liver disease. The disease usually shows no symptoms but chronic liver infection triggered by the hepatitis C virus could lead to liver fibrosis and cirrhosis. About 1 to 2% of infected people will suffer from liver fibrosis and could develop into hepatocellular carcinoma (HCC)

At the moment, there are no vaccines available for hepatitis C, therefor, prevention is critical for reducing potential disease risks. Some of those preventions that you should keep in your mind is: keep up with your vaccinations, don’t receive unsafe blood donations, don’t share your needles when injecting yourself, or acupuncture, tattoo, nail making, used blade shaving, and sharing toothbrushes, etc.

2. Hepatitis B virus

 
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While hepatitis C virus is a single strand RNA virus, hepatitis B virus is a double strand DNA virus. Although, they are two different viruses, hepatitis B virus could also trigger infections such as acute and chronic hepatitis, liver fibrosis, hepatocellular carcinoma (HCC).

Hepatocellular carcinoma is a dangerous cancer which is can only be treated by surgery or liver transplant.

3. HPV virus (Human papillomavirus)

HPV is a double strand DNA virus which cause warts on areas of the body including the genital. Some types of this virus could lead to cervical cancer. Moreover, long term HPV infection could lead to various other cancers such as skin cancer in immunosuppressed patients.

Now, thanks to PAP tests, we can get an early diagnoses of those diseases in order to effectively treat cervical cancer patients.

4. Human T-cell lymph tropic virus type 1 (HTLV-1)

 
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Each year, around 5 million people are infected with this virus. However, only 5% of them have symptoms. HTLV-1 causes adult T-cell leukemia-lymphoma (ATLL) which is a rare cancer that infects the body’s T cells, specifically white blood cells known as CD4 T cells that help fight off infection. After 20 to 30 years after the virus infection, a patient still could develop a T-cell leukemia-lymphoma.

Chemotherapy can initially be used to treat infected people. However those patients can only prolong their lives for about 8 months after the infection.

5. Epstein-Barr virus (EBV)

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EBV is a common virus. About 95% of adults have this virus in their bodies but most of them are preclinical cases and only few will suffer the disease.

EBV is related to various cancers included B, T cell lymphoma, Hodgkin, and nasopharyngeal cancer.

6. Herpes virus (HHV-8)

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HHV-8 virus belongs to the biggest double strand DNA virus family. This virus causes disease for both human and animals, specifically Kaposi sarcoma which cancer has been seen in AIDS patients. However, in healthy people, who have good immune systems, HHV-8 rarely triggers malignant disease.


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