How widespread are head lice?
It is difficult to track head lice cases because head lice are not considered a disease and therefore public health departments and the Centers For Disease Control do not routinely track the number of head lice cases. However, schools and manufacturers of lice products estimate head lice cases at 12- 25 million infestations a year in the United States alone. Most of those infested are children under the age of twelve. Head lice have been infesting humans since the cave days.
The Centers for Disease Control does not track the number of head lice cases, because it’s not considered a disease. This makes it difficult to track head lice cases; however, schools and manufacturers of lice products estimate head lice cases at 12-25 million infestations a year in the United States. Most children infested with head lice are under twelve years of age.