Evolution is a bitch. Humans have been living with viruses for tens of thousands of years and we are still here. Both are constantly adapting. A viruses goal is to survive and killing the host is detrimental to its survival. So it will adapt to become less lethal. On the other hand humans adapt and eventually because semi-immune to these viruses. On top of that we now have the technology to combat these things very effectively. Forget all the scare mongering from Umair Haque and Jessica Wildfire. Humanity will be fine. Get your shots and take the proper precautions. You probably have a greater chance of getting killed in your car on the way to Starbucks.