Unless you want to live naked in a tribe on the African savannas, "normalcy" has been changing for tens of thousands of years, and very fast for the couple hundred, and extremely so for the last hundred. It should not be a surprise that it continues to do so, and "you have to get certain vaccines" has been a thing for any kid going through public schools and/or college for decades. This is nothing new.

92% of Americans are vaccinated for polio within 24 months of birth. 90% for MMR. 90% for chickenpox. 80% for DTaP. https://www.cdc.gov/nchs/fastats/immunize.htm