Embodiments of a mobile device and method for secure on-line sign-up and provisioning of credential for Wi-Fi hotspots using SOAP-XML techniques are generally described herein. The vaccine comprises one or more antigens for the prevention or treatment of sexually transmitted diseases, for example an HSV glycoprotein D or an immunological fragment thereof, and an adjuvant, especially a TH-1 inducing adjuvant. The yoke is also selectively pivotal about a second pivot axis substantially transverse to the first pivot axis for movement along a second path. Based on the determined ratio, the selected ROI on the multimedia content being rendered on the display screen is dynamically modified based on the determined ratio.