You really don’t if it’s controlled. The control group would have any other factors baked in. If the group that got the vaccine has a 13% lower all cause morta

You really don’t if it’s controlled. The control group would have any other factors baked in. If the group that got the vaccine has a 13% lower all cause mortality than the group that didn’t, and it was your standard randomized controlled double blind study, that’s a huge win.