Almost 90% of the European cases were reported in Romania.
Thirty states have cases, and 83% of infections are part of outbreaks, the largest centered in West Texas.
Some of the key steps have included deployment of more community health workers and decentralized lab testing.
A 10% decline in vaccine uptake could lead to 11.1 million cases of the highly contagious illness in that timeframe.
Though confidence in the vaccine remains high, KFF found that misinformation is sowing more doubts.
New Mexico and Oklahoma, 2 states with Texas-related spread, also report a few more cases.
Louisiana, Missouri, and Virginia all report cases that have links to international travel.
As more states report outbreaks, the country is well on track to reach the most cases since measles was eliminated in 2000.
After the onset of the pandemic, 10 countries saw an increase in measles incidence.
Texas has 20 new measles cases.
