https://www.factcheck.org/2023/08/scicheck-factchecking-robert-f-kennedy-jr/

https://www.factcheck.org/2023/08/scicheck-rfk-jr-s-covid-19-deceptions/

https://www.nzz.ch/english/robert-kennedys-new-book-is-full-of-covid-19-conspiracy-theories-ld.1658762

There are many more.