In a recent article published in Pediatrics, researchers investigated a measles outbreak in Minnesota in 2011. The authors, lead by Pamala Gahr of the Minnesota Department of Health, determined that the outbreak began when an unvaccinated 2-year-old travelled to Kenya, where he contracted the measles virus. Upon returning to the United States, the child developed a fever, cough and vomiting, some of the early signs and symptoms of measles. Unfortunately, prior to a diagnosis of measles, the child passed the virus on to three children in a child day-care center and another household member. The measles then spread from individual to individual within a low vaccine uptake area, a Somali immigrant community in the Minneapolis area. Eventually, more than 3,000 people were exposed to the disease.