Why does lice seem to vanish from the Earth as soon as everyone becomes like 12 years old?

Question

Why does lice seem to vanish from the Earth as soon as everyone becomes like 12 years old?

In: Biology

Answer 1

Adult people can generally be trusted not to paw at the heads of their peers and will address any itchy sensations or the feeling of critters running about on their scalp with appropriate medications. There definitely are older people with lice but they tend to be the vagabonds pushing shopping carts down the street full of trash and yelling at the street lamps, not normally functional adults.