If there's one thing we know about the virus, it's that the elderly are more susceptible to severe disease and death. But in the nation with the world's oldest population, Covid fatalities have plummeted. There were just six confirmed Covid deaths in Japan over the past week, the lowest since July 2020. Compared with other developed nations such as Germany or the U.S., it's even more remarkable - no Group of Seven member has seen its daily death toll fall so low since the pandemic started in earnest. Of course, that slump parallels a collapse in reported cases in Japan, to fewer than 200 a day the past three weeks, down from more than 25,000 daily infections in August, when an outbreak of the more transmissible and harder-to-control delta variant peaked and quickly receded. It's unclear exactly why the wave of cases seen in late summer and early fall reversed so dramatically. A slow-to-start but now comprehensive vaccination campaign is at least partly responsible, along with almost universal but voluntary use of masks. Japan has never locked down, but many people have cut back on going out in public to crowded places. Across the whole pandemic, Japan has seen more deaths than places such as China, New Zealand, Taiwan or Australia that tried to completely eliminate the virus, or South Korea, which has also kept deaths very low. But at this point, the daily number of deaths in Japan is below even Australia or South Korea.