HPV, hepatitis B vaccines key part of cancer prevention
                                
                                
                                    (Newser) -
                                    A sixth of all cancers worldwide are the result of potentially treatable or preventable infections caused by bacteria, viruses, and parasites, according to a new study. Researchers found that that almost 2 million new cancer cases in 2008 were caused by the human papilloma virus, hepatitis B, hepatitis C, and...