June 2021 through March 2022, when Americans had clear access to vaccines, about 61% of Covid-19 deaths were probably preventable according to a new study.

KFF analyzed the monthly death toll, parsing out vaccination status and controlling both for age (older Americans are still at increased risk of death even when vaccinated) and for the imperfect efficacy of the vaccines. That allowed them to estimate the number of preventable deaths per month from last June through March.

In just one year at least 234,000 dead Americans could have lived had they been vaccinated. Or as the study concludes plainly: “…most deaths continue to be among those who are unvaccinated.”