The first question that comes to mind is What is Digital Twin? and How is it related to Data Science and Medicines that we are studying here. Don't worry we are going to start our post from this point only. What is Digital Twin? As the name suggests, Digital Twin is something related to Twin or a copy of something with a digital presence, or Virtual Presence. So, now the question is What is this "something" of which we create a copy? This "Something" can be anything process, plant, factory, human, machine etc. which is not well defined and might require multiple rounds of mix and match setups to get to the desired/maximum efficiency. These repeated steps not only take a lot of time but also a huge amount of money is also involved in the whole process. Also, there is an uncertainty that the process would succeed or not and how much more time will be required to get the final version. Let's take a small example to understand the whole concept of the Digital