It has been known for over 40 years that certain viruses can cause cancer. The first such “oncovirus” to be identified was Epstein-Barr virus (EBV), which was associated with lymphoma in 1964. Since then, several other human cancer viruses have been discovered; together, they account for an estimated 12% of malignancies worldwide.
There are two ways in which infection with a virus can lead to cancer, termed “direct oncogenesis” and “indirect oncogenesis.”
Not everyone infected with an oncovirus will develop cancer. In fact, in most people an oncoviral infection causes no symptoms at all, a mild illness only, or a non-cancerous condition (e.g hepatitis in the case of the hepatitis viruses).
Seven viruses are currently known to cause cancer in humans.
The recent discovery of MCV, suggests that other, currently unknown oncoviruses are likely to be identified in future studies.
The number of cases of cancer each year, particularly in developing countries, would be greatly reduced if these viral causes could be eliminated. Two vaccines against oncoviruses are currently available – HBV vaccine (given routinely to infants in many countries) and HPV vaccine (recommended for girls or young women, though also available for males). Creating vaccines against the other oncoviruses is the subject of major research worldwide.
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The common and the first thought on people suffering from genital warts would surely be "How to Get Rid of Genital Warts" and thought is quite valid one. While few cases have visible genital warts that are not only irritating to the bearer but also appear repulsive, others are just invisibly unpleasant.
The U.S. Centers for Disease Control and Prevention stated there were over 1.7 million new cases of chlamydia reported in the country, making it the most common STD in the nation. The problem with chlamydia is that most people don’t immediately know they’ve been infected with the disease. It is asymptomatic in the beginning – a reason many cases stay untreated for so long.