It’s not that big of a deal – use the lice shampoo and the lice comb as directed – usually two days in a row takes care of it. You have to thoroughly wash the linens, pillows, comforters, etc of the lice-bearers room and it would certainly hope to ask them to put away their laundry. The kid is probably getting it from someone at school – so remind them not to share hats, etc. And also – make sure to wash that kids hats and jacket. They are not that difficult to get rid of – I’ve had a few bouts while travelling – and never had a problem eliminating them tout suite.