Well, let's start with the physical. Most masks do not help, though if you have a cough it assists in not sharing the virus through the spittle of a cough, but in that case you should be staying home or in the hospital, depending on severity. The biggest thing is, yes, wash your hands...
Wet your hands with clean, running water (warm or cold), turn off the tap, and apply soap. Lather your hands by rubbing them together with the soap. Lather the backs of your hands, between your fingers, and under your nails. Scrub your hands for at least 20 seconds. ~Centers for Disease Control...or at least use sanitizing liquid or foam with 60+% alcohol - the basics. I understand it is a respiratory illness, but most contagion is transferred from touching an object that was coughed or sneezed on and then touching your face or hands, etc. Though the likelihood of it showing up at your doorstep is slim, it is good to be prepared and take the basic measures of any virus. And if you do feel sick or contract the flu or virus, get thee to the doctor. Science of Mind, mental science, metaphysics, and New Thought are not about ignoring the physical, it is about taking care of things in all its forms, the physical and in consciousnesses. God is in the medical procedure, too.
In Mind, let us remember that the consciousness of fear that this virus will show up at your doorstep is an attitude that will not serve you. Taking precautions in the physical and working the consciousness of health and protection in Mind is using the full spectrum of the Power and Presence of Spirit.
Fear, beyond the “alert system” designed to make us aware of imminent danger, is a corrosive element which weakens our ability to see clearly and to respond compassionately. Fear drives us to make excessive and unrealistic demands on conditions and the people around us. It drives us from grace. ~Dr. Jim LockardIf fear is in your consciousness (and I understand the news screaming at you doesn't help), then work on relieving/healing that fear with the Love and Power that is yours as One with the Divine. Harm has a rough time coming near you as you surround yourself with knowledge, expertise, the consciousness of health, and a communion with the Source and Substance of your supply.
Treat (affirmative prayer) and wash your hands!