South Carolina measles outbreak reached Washington state five times in two weeks, study finds
Five importation events led to 26 Washington cases before officials stamped out the spread
Washington state health officials have detailed how South Carolina's measles outbreak reached their state through five separate importation events over two weeks in January, causing 26 infections among residents before the spread was halted. The study, published this week in NEJM Evidence, says the episodes signal that domestic travel now poses a greater risk than international travel for bringing measles back into US communities.