In this episode of TechKnow, we look into the science of immunotherapy, which involves tricking the body’s immune system into attacking cancerous tumours. Donated T-cells are given an extra gene to make them target specific leukemia cells along with other genes which are disabled to stop them attacking their host. We also explore a promising cancer drug called Pembrolizumab. This drug make the tumour visible to the T-cells. More from TechKnow on: Twitter - https://Twitter.com/AJTechKnow Website - http://aljazeera.com/TechKnow Subscribe to AJE on YouTube - http://aje.io/YTsubscribe - Subscribe to our channel: http://aje.io/AJSubscribe - Follow us on Twitter: https://twitter.com/AJEnglish - Find us on Facebook: https://www.facebook.com/aljazeera - Check our website: http://www.aljazeera.com/