From the sub-headline (?) > some health experts have expressed caution about the companies’ confident assertions that the vaccines are 95 percent effective for

From the sub-headline (?) > some health experts have expressed caution about the companies’ confident assertions that the vaccines are 95 percent effective for all populations. Obviously a vaccine isn't going to erase preexisting differences in health outcomes. Closer to a factor on some prior susceptibility (though of course not so cleanly linear in reality).