Republicans were, though, more likely to believe Russian disinformation claims than their Democratic counterparts, with 57.6% falling for at least one Russian disinformation claim, compared with just 17.9% of Democrats and 29.5% of people who didn’t identify with one particular party.
The problem with these debunks is that the “false claim” is adjusted so that it is easier to debunk.
By specifically focusing on polio it can be claimed this was never true. Remove the word polio and there is partial truth. Some combined vaccines still contain tiny amounts Thimerosal though most don’t.