From the U. of Texas:
Twenty-five counties across the country have been identified to be most at risk for a measles outbreak due to low-vaccination rates compounded by a high volume of international travel, according to an analysis by researchers at The University of Texas at Austin and Johns Hopkins University.
Since January 2019, there have been more than 700 confirmed measles cases in 22 states — nearly double the amount of last year and the highest number reported since the virus was eradicated in the United States in 2000.
In a paper published in The Lancet Infectious Diseases, researchers warn the epidemic will worsen, identifying the 25 counties that are most at risk for an outbreak. Their analysis considered an area’s volume of international travel from foreign countries with large measles outbreaks and the prevalence of nonmedical exemptions from childhood vaccinations.