But I would isolate her until you decide...
Also they do get stuff stuck in their noses and throats that can cause irritation... Just like when we get pepper up our noses... I wouldn't worry about the occasional sneeze.
I am a little different in my thinking for this. If it is something severe even with antibiotics they will be carriers. I don't treat for respiratory infections... Some snap out of it cause they can catch colds and others will just die. I know many on here will tell you to give antibiotics to...