There are people everywhere publicly saying vaccines are great and other saying they are terrible. Andrew Wakefield, then Jenny McCarthy, really kicked things into high gear with their claims, and that was 20+ years ago.

Then, as now, reasonable people recognize that while no vaccine is perfect (hell, even a natural exposure to many diseases doesn't always confer immunity) on the net they are improving health way more than it is causing loss of health. Then, as now, people who claim unsupported things (MMR causes autism) are going to get push-back.

The only thing that has changed, that I can see, is that the denialism is stronger now than it was five years ago.

This was laughed out of the room 5 years ago too, the only difference is now the HHS secretary designate is also an anti-vaxxer in addition to the incoming president rather than just the President.