How do you deal with the fear that you will be hit by a drunk driver when driving your car?
How do you deal with the fear that your plane will crash when flying?
How do you deal with the fear that you will catch a disease and die?
I evaluate the risk as best I can, and decide if the benefits of the activity outweigh the risks. If yes, then I do what I can to mitigate the risks, and then stop worrying about them. Really, that's the only way you can get through life.