Would HHS--a federal organization--normally be involved for something of this nature in a single state?
https://www.cdc.gov/measles/data-research/index.html
https://en.m.wikipedia.org/wiki/United_States_Public_Health_...
A declaration or official determination? Dispatching some kind of team? A press conference to assure the American public that they are aware and monitoring the situation closely?
The the majority of the blame here lies on years of behavior by people and officials within Texas.