It's impossible to reduce your risk to zero. Everyone will eventually be exposed to the virus, and when it happens to you, there's some probability that your immune system won't catch it right away and you'll get sick.

The point of hygiene precautions is just to slow the spread. That will avoid everyone geting sick at the same time and overwhelming the health care system. A vaccine or better supportive treatments may arrive in the meantime.

You should also stay generally healthy. On that fateful day when you have your first exposure to the virus, the speed at which your immune system springs into action will make a big difference. Your chances are better if you've been eating and sleeping well and exercising.

Far more details at https://www.thelancet.com/journals/lancet/article/PIIS0140-6...