Watching the citizens carefully to try and figure out who's infecting who is very cool. Really interesting mechanic. I found that hitting houses is a bit more luck-based. Most of the time I couldn't tell which house would have infected people, especially if nobody stepped outside for a while. I would focus on the citizen interactions the most and diversify them. Maybe have a food market, or a party, or different things that you need to keep track of outside of the homes. Great work!