Maybe remove the PFAS from the floss as well and you've got a great product.
Now you just have to figure out how to get people to floss :)
Plenty of flosses are available without pfas. The flat glide / smooth floss and potentially flavors (unknown - not required to disclose) are the ones with pfas. Wax coated unflavored floss does not use pfas.
Unfortunately, the article [0] states that "flat tape" floss was used as the delivery method. And this is the form of those smooth/glide pfas flosses. Likely the pfas was used as a functional group to bond the vaccine coated particles to the floss.
If there are any future vaccines.