Lice eggs will not be contagious. They are glued immediately onto a hair strand and do not slide off. If a strand of hair falls off which has a nit connected to it and it transpires* to hatch, it will eventually die. The nymph (inside the egg) would need the https://lice-treatment-virginia-b33322.ampedpages.com/what-does-heated-air-lice-treatment-mean-57403709