I assume this virus spreads like flu and cold viruses - lots of hand washing and hand sanitizers should do more to prevent catching it than any breathing mask.
And avoiding touching the face before washing hands as much as possible. That’s how viruses get in—by hitchhiking bacteria that enter through an orifice usually in the head. It’s not about preventing a single virus from getting in, it’s about not letting too many of them them overload the immune system.