While a blind trial is preferable, we can and should still gather data based on unblinded trials. Using the voluntarily unvaccinated in trials as a control grou

While a blind trial is preferable, we can and should still gather data based on unblinded trials. Using the voluntarily unvaccinated in trials as a control group will yield meaningful data at scale, just not as good as it could be. For example, are they being diagnosed with heart problems less often? That is not likely to be placebo.