> mucous membranes Depends on which membranes. I think I remember reading that the reason these can transfer bird-to-human but not human-to-human is that they

> mucous membranes Depends on which membranes. I think I remember reading that the reason these can transfer bird-to-human but not human-to-human is that they can only infect us if it gets so deep into the lungs we can't actually expel it from breathing or coughing.