Erratum: Vol. 66, No. 17

In the report “Addressing a Yellow Fever Vaccine Shortage — United States, 2016–2017,” on page 457, the first sentence of the fourth paragraph should have read “In 2015, approximately 9.5 million aviation passenger-journeys from the United States to 42 countries with endemic yellow fever virus transmission occurred (1) (Data In, Intelligence Out [https://www.diio.net], unpublished data, 2016).”