Children are especially susceptible because of their close contact in day cares and schools.
It is not surprising then, that the highest rate of infection occurs in September and October, as they return to school. The presence of lice is a sign of poor personal hygiene. Only children are susceptible. However, infestation is more common among children between 3 and 10 years because of their tendency to be in close contact with others, especially at school. Long hair encourages infestation.