www.theguardian.com/environment/2021/oct/17/us-epa-pfas-forever-chemicals-sites-data
FYI
Moderna on the cusp of getting booster approval.
Get it when you can.
I can’t definitively advise about mixing vaccines but the data seems to support it and it also appears that Moderna is a little better at protecting against the Delta variant.
Just expect to have a greater chance of a few days of side effects.
Some anecdotal reports of people getting mixed vaccines suggest more temporary reactions.
Makes sense since your immune system is getting stimulated form another angle.
Have a great weekend
Stay safe and be well.
AC