For years, patients harboring anxieties have actively complained about them. But it turns out that the science bears that some stress or anxiety is actually good for you. (for starters read The Upside of Stress - by Kelly McGonical or today's NY Times article). But this is really nothing new: I have urged my patients to heed Rumi's advice and "welcome it all". Actually, we need some stress for emergent actions (think a tiger appears). But the Coronavirus is a different animal (so to speak).This may normalize your previous anxieties and/ or at least put them into a different perspective.
But increasing your breathing exercises and practice in order to beef up lung capacity to combat the virus may actually be quite beneficial. The deep-breathing exercises that I have taught my patients (some of which are based on Coherent Breathing) may actually serve you should you fall ill. In today's New York Times article, a Chinese nurse recovering from the Coronavirus used deep breathing to strengthen her lungs; this could be a life altering clue; so, it wouldn't hurt to practice deep breathing and learn how to regulate your breath and yes, your anxiety.
Of course, do take all necessary precautions when in public, but go outside when you can, breathe in some deep air wherever you are and be grateful. And your anxieties? As Rumi said, "This being human is a guest house. Every morning a new arrival. A joy, a depression, a meanness, some momentary awareness comes as an unexpected visitor. Welcome and entertain them all."