If a ritually-clean person put his head and the greater part of his body into a ritually-unclean house, he is rendered unclean. If a ritually-unclean person put his head and the greater part of his body into a ritually-clean house, he renders it unclean. If he put three fingerbreadths of a ritually-clean cloak into a ritually-unclean house, the cloak is rendered unclean. If he put even an olive-sized piece of a ritually-unclean cloak into a ritually-clean house, the house is rendered unclean.
If a person entered a nega-infected house with clothes on his shoulders and his sandals and rings in his hands, both he and they are immediately rendered unclean. If he was wearing his clothes and had his sandals on his feet and his rings on his hands, he is immediately rendered unclean but they remain clean until he remains long enough to eat half a loaf of wheat bread – not barley bread – reclining, with a condiment.