International Importation of Measles Virus—United States, 1993–;2001

Two Measles Outbreaks After Importation — Utah, March–June 2011

Before licensure of a measles vaccine in 1963, more than 500,000 measles cases on average were reported in the United States each year during 1951-1962. By 1993, through measles vaccination and control efforts, only 312 cases were reported nationwide. In 2000, the last year in which an outbreak had occurred in Utah, measles was declared "not endemic in the United States," but measles importatio...

Importation of the evolving measles virus genotype d9 to yamagata, Japan from Thailand in 2009.

The measles control project led by the World Health Organization (WHO) is ongoing with a current target of measles elimination in the WHO Western Pacific Region, including Japan, by 2012 (1). Laboratory-based surveillance plays an important role in the control of measles. Although IgM enzyme-linked immunosorbent assay (ELISA) is used as the standard method for confirming measles cases (2), viru...

International Importations of Measles Virus into the United States during the Post-Elimination Era, 2001–2015

Measles Transmission at a Domestic Terminal Gate in an International Airport — United States, January 2014

In March 2014, CDC identified a possible cluster of four laboratory-confirmed measles cases among passengers transiting a domestic terminal in a U.S. international airport. Through epidemiologic assessments conducted by multiple health departments and investigation of flight itineraries by CDC, all four patients were linked to the same terminal gate during a 4-hour period on January 17, 2014. P...

International measles incidence and immunization coverage.

Measles is exquisitely sensitive to immunization programs. We investigated the decline in measles incidence after immunization with 1 or 2 doses of measles-containing vaccine (MCV), with or without supplementary immunization activities (SIAs). Using data from the World Health Organization, we modeled the impact of measles immunization using a negative binomial regression model. All countries of...