New answers tagged parasitology
Children generally don't care about their hair as much as adults do. So unless parents insist, they don't care for their hair as much (reference). Kids generally get lice because they are in close contact with each other during play-dates, slumber parties, and sports activities. They are also prone to exchange hair brushes and other personal items more often ...
Lice prefer clean hair, so in addition to closer contact among children, adults seem to use more hair product (gel, hair spray, etc.) than children in preparation for their day. Lice have difficulty moving through hair strands that are stuck together with product, so this may also contribute to the prevalence in children.
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