Are head lice really just tiny vampires?

What exactly are lice? How do lice feast on your head? How do you get rid of lice (or avoid them in the first place)? For free home activities sign-up at www.WhoSmarted.com See omnystudio.com/listener for privacy information. See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.