There are two ride-hailing apps that dominate the scene: Uber and Lyft. Both have been around for the last several years, with Uber starting around 2009 and Lyft launching in 2012. Both have apps for Android and iOS, while only Uber has an app for Windows Phone as well.
Medicine/Medical. the preventing of disease. the prevention of a specific disease, as by studying the biological behavior, transmission, etc., of its causative agent and applying a series of measures against it. prophylactic treatment, as the cleaning of the teeth by a dentist or dental hygienist.
Either split PrEP to an independent article or expand the article so that HIV is only part of it. Please help improve this article if you can. PrEP, an acronym from Pre-Exposure Prophylaxis, is the use of prescription drugs as a strategy for the prevention of HIV/AIDS by people who do not have HIV/AIDS. It is an optional treatment which may be taken by people who are HIV negative, but who have substantial, higher-than-average risk of contracting an HIV infection.