Erectile dysfunction (impotence) is extremely common, affecting more than 50% of men between the ages of 40 and 70 years. It is defined as an inability to obtain or maintain an erection firm enough for penetration and satisfaction of both sexual partners. Erectile...

Human papillomavirus (HPV), is a group of very common viruses, which the majority of people will be exposed to in their lifetime, often through sexual contact. HPV infections do not usually cause symptoms and most people will be unaware they are infected. There are...