South Carolina measles outbreak has spread to Washington state five times in two weeks

Measles cases tied to South Carolina's outbreak have reached Washington state on five separate occasions over a two-week period. Health officials have traditionally viewed international travel as the main source of measles importations into the United States, but that pattern no longer holds. Instead, domestic spread between states is now driving new cases. The repeated transmissions highlight how quickly the virus can move across state lines within the country. The article's brief text does not provide further details on case counts or public health responses.