If they didn't mean that, I hope they apologize.I don't think the reply above was meant that you are stupid - but that someone saying to cull for sneezing alone was. No need to be sorry!
I do agree that if there are no other symptoms, not to worry. I have an 11 month old Australorp who sneezes from time to time. I worried at first but she never got any other symptoms and she is healthy, eating and laying well. Some girls seem more prone to dust or whatever, and will sneeze just like we do sometimes. See if you can check her nostrils to make sure they aren't blocked - these are very fragile, so I wouldn't go prodding around, myself.
Keep an eye on her, make sure they get some vitamins maybe, or are generally having a good, varied, diet. And post again if any further symptoms develop.
Best of luck
Katrina