I probably heard most of this from the Magic Schoolbus, so don’t take me as a concrete source of truth.

My intuition says that you’re at a lower risk by breathing through your nose. How much lower, I can’t say, it might be marginal.

The mucus in your nose is part of the immune system. It’s designed to trap foreign particles and prevent them from getting deeper into your respiratory system.

So with that in mind, I’d think that blowing your nose after exposure could be a safe bet. But make sure to wash your hands before you touch your face. Maybe after too.