Measles outbreak spreads across a county in Washington State, and health officials declare a medical emergency. The county has one of the lowest vaccination rates in the state.

Measles outbreak spreads across a county in Washington State, and health officials declare a medical emergency. The county has one of the lowest vaccination rates in the state. https://t.co/44WB7Pbt86

— NYT National News (@NYTNational) February 7, 2019