the CDC quite likely skews low, given the political ramifications. i've heard non-governmental estimates as high as 80% at this point. my expectation is that 2/3 of americans have had it, which is roughly borne out in my anecdotal experience, particularly since omicron. i think that's why we're seeing the mediopolitical machine starting to relent on covid policy in the past few weeks (that, and it's an election year).