We’ve all heard that the Pfizer and Moderna vaccines are 95% effective with 2 doses. But they are actually 90% effective with just one dose. Switching to a one dose regimen would effectively double the rate of vaccination of the population and bring the pandemic to a speedy end.
Remember that the original requirement was for the vaccine to be 60% effective.
But the FDA will not authorize the change, and tens of thousands will die needlessly while we reject the good in chase of the perfect.