E-cigarette Debate

Are E-cigarettes helping people stop smoking or encouraging them to start? The World Health Organisation has called for a ban on their use indoors, at work and on their promotion to young people. But are they an important tool in saving lives globally by helping people quit or are they making smoking acceptable and encouraging teenagers to smoke real cigarettes?. We answer your questions about the transmission of the Ebola virus. How do you catch it? Are its symptoms similar to diseases like malaria? Is it possible to catch it from sweat? The World Anti-Doping Agency has banned athletes from inhaling the noble gases xenon and argon. But why have they been banned and how do they help sporting performance?