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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It was four years ago when Lora Ivanova and Ursula Hessenflow were talking at a Los Angeles café about the L.A. dating scene. The biggest aggravation they had was the ability to talk about safe sex when first meeting someone. How could one deal with the discomfort of asking someone they just met if they were tested for STDs?
There is nothing to laugh about when it comes to sexually transmitted diseases. According to the latest information from the Center for Disease Control and Prevention, gonorrhea, chlamydia and syphilis have seen a dramatic rise across the U.S. In fact, 50 percent of sexually active Americans will catch something before they turn 25 years old.
Syphilis, which appeared to be an STD of the past, appears to be making a huge comeback and it could be the result of social media dating apps. According to the National Coalition of STD Directors Executive Director David Harvey, infection rates are much higher than they have been for the last 20 years. The Centers for Disease Control and Prevention said there has been a 17.7 percent rise in the number of syphilis cases from 2014 to 2015.