Good post, Dr. T. These senators are crack-pots.

Regarding measles vaccine, PMID: 36935110 found that induced antibodies wane by 4.8% per year, but critics may say T-cell immunity remains. Even so, overall immunity (T-cell + antibody) wanes by just over 2% per year -- so that, after 19 years, just 60% of original immunity remains (PMID: 31732326).