IN MID-SEPTEMBER, King County, Washington, in which Seattle is located, released an eye-popping slide about vaccine efficacy and breakthrough prevalence: Vaccines had reduced the risk of infection from COVIDsevenfold, county data showed, and reduced the risk of hospitalization and death 41-fold and 42-fold, respectively. These ratios, though bigger than those found in other studies released in recent weeks, are nevertheless in line with an obvious emerging consensus in the data: Vaccines do clearly reduce transmission and dramatically reduce hospitalizations and deaths, making the threat of severe outcomes to the vaccinated much more like the risk associated with other, far more quotidian diseases.
But in small type, King County included some other data that paint what seems at first blush like a very different picture: Fully 25 percent of deaths were…