MyChart nagged me for a couple of years about vaccines that either I was too old for, or weren't in their system because I'd gotten them years or decades earlier, including one that was listed as being overdue since the day I was born.

I just took a look at MyChart, and some of those vaccines are now listed but labeled as "not due," which I think means that the system has no record of my childhood polio vaccine, and for some reason is programmed to flag that for everyone. (Mousing over the question mark on those produces a message saying this item is no longer appropriate for me, and I don't need to worry about it, it's there to give me "a more complete picture of your preventive care items.")