I think small towns could still replicate some of the exposure risk caused by population density since there will often be only one or two stores to buy groceri

I think small towns could still replicate some of the exposure risk caused by population density since there will often be only one or two stores to buy groceries, generally located in the largest town in a larger rural area. People will gather in those stores in relatively dense numbers compared to the community at large. Mix in a reluctance to wear masks and determining the correct multiplier becomes more challenging.