Head Lice love school vacation week. Why? Because your kids go to Vermont to visit their cousins.  If their cousins have lice then they transmit them to your kids and your kids bring Vermont head lice back to their friends in the Boston area.  If your kids have head lice then they transmit them to their cousins in Vermont, thereby transmitting Boston head lice to Vermont!  This is possible because most people with head lice are asymptomatic and unaware that they have head lice. In addition most parents have no understanding of what represents effective head lice removal treatment.  Head lice benefit from all of this misunderstanding.