Since OP didn’t provide reasons, I will.

Window screens: malaria prevention.

Indoor plumbing: make sanitation so convenient that you don’t have any reasons not to use it (vs throwing the old night bucket outta the window). Obviously city scale sanitation == no dysentery, cholera...etc.

Sanitation systems are really old, though.

I was impressed with the sophistication of the one present in Glanum, a small (but wealthy) Roman provincial town abandoned in the 2nd century. The sewer system runs underneath the main street: baths, villas, and the abatoir connect to it.

To say nothing of the ones in major cities of the time.

Except window screens still aren't common in Europe.

That doesn't mesh with my experience. When I moved from the UK - where windows open outwards and its not really possible to have screens - to the countryside in mainland Europe where mosquitoes and flies are much more common, one can buy mosquito nets for windows from the supermarkets. I don't regret that purchasing decision at all - being able to have the window open at night in summer means I can actually get some sleep :)