Covid-2019 - 2021-09-11

We were afraid that as the US Delta-wave progressed, deaths would catch up to infections and the case-fatality ratio would rise. But from all-time lows, after a couple weeks of almost imperceptibly rising, it is falling again now. Is Delta less lethal? Are the vaccines acting as therapeutics that help in the worst cases? Are we just getting better at treatment? No way to know, but the news is encouraging (especially now that infections seem to be rolling over, too).