Photic sneeze reflex, officially known as ACHOO syndrome, causes sudden sneezes when exposed to bright light. This reflex ...

During a sneeze, the eyes also close and people often make a characteristic "achoo" sound. “You’re not conscious of it, it’s ...

Following is a transcript of the video. Narrator: Achoo! Are you sick? Don't you dare sneeze on me! Do you know how far your germs can travel? Normally, you hold about half a liter of fluid in ...