I have a good friend who insists upon sending me YouTube clips and articles referring to Dr. Lee Merritt, an orthopedic surgeon who thinks she knows something about vaccines.  Please see this helpful article if you have any doubts. 

https://healthfeedback.org/claimreview/vaccines-are-useful-even-when-there-is-a-treatment-for-a-disease-contrary-to-claim-by-lee-merritt-in-the-new-american-video/ - https://healthfeedback.org/claimreview/vaccines-are-useful-even-when-there-is-a-treatment-for-a-disease-contrary-to-claim-by-lee-merritt-in-the-new-american-video/