Squalor caused disease to spread because... 1. Few houses had inside baths or Many people hardly ever washed.
2. There was no proper sanitation. was just dumped in the streets.
3. Rooms were badly ventilated, especially those in
dwellings.
4. Rubbish in the street encouraged
5. Drinking was often contaminated.
6. Houses were often damp and in poor repair, with floors of earth

Word Options:
sewage
earth
toilets
water
vermin
cellar
bare