The largest measles outbreak in decades has reached San Antonio and San Marcos. Officials say an individual who tested positive for the virus in West Texas traveled to two major universities and one of the nation's busiest tourist attractions — the San Antonio River Walk.
Anecdote!=data
According to Gallup, 40% of Republicans “don’t plan” to get vaccinated… just 3% of Democrats.
https://www.brookings.edu/articles/for-covid-19-vaccinations-party-affiliation-matters-more-than-race-and-ethnicity/
Antivax sentiments exist on both sides they are very niche on the left and very strong on the right.