"A thunderous sneeze is a learned behavior," says Mas Takashima, chair of the otolaryngology department at Houston Methodist.

While it’s fine to muffle a sneeze, experts warn: Don’t hold in a sneeze altogether. It’s important to allow the air pressure in your lungs to escape, Piccirillo said. In rare cases ...

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 ...