That makes sense and should have a smallish effect. But to compensate for such a large and sudden drop in life expectancy wouldn't the survivors need to be exce

That makes sense and should have a smallish effect. But to compensate for such a large and sudden drop in life expectancy wouldn't the survivors need to be exceptionally more healthy than average and live significantly longer? That's surely not going to happen in two years either. So what I would expect is a very slow reversion back to average, with maybe a slight bump above average in ten years or more.