A head lice epidemic is likely to spread through an elementary school classroom quickly in cooler weather when students wear hats and scarves. Coats and layered shirts can be the culprit as well. The reason for this is that students sometimes share these items. Your child’s teacher can offset the spread by making sure that these items never touch each other, and that coats are not piled up together where live lice can jump from one garment to another.With the advent of the Internet, the amount of information one can easily find on the subject is voluminous. Unfortunately, most of it is flawed in important aspects, being unsubstantiated, anecdotal, or merely quoting other unsubstantiated and anecdotal articles. Official sources, such as many informational publications put out by the US government, are not immune to this criticism.