Yeah, I didn't quite understand why it should make us worry. We do have a lot more tools at our disposal than people had 20,000 years ago - vaccines, antivirals (in a few years), knowing to social distance, etc.
1. sanitation
2. hand washing
3. understanding of how the disease spreads (not swamp gas)
4. knowing that throwing virgins into volcanoes does not work
5. clean water
Social distancing is something that people even now are loathe to engage in, fortunately more and more people 'get it' but there are still plenty that do not. Arguably that's Darwin at work, but still.