Maintenance of Measles Elimination Status in the United States for 20 Years Despite Increasing Challenges.

ABSTRACT:

Background

Measles elimination (interruption of endemic measles virus transmission) in the United States was declared in 2000; however, the number of cases and outbreaks have increased in recent years. We characterized the epidemiology of measles outbreaks and measles transmission patterns after elimination to identify potential gaps in the US measles control program.

Methods

We analyzed national measles notification data from 1 January 2001 to 31 December 2019. We defined measles infection clusters as single cases (isolated cases not linked to additional cases), 2-case clusters, or outbreaks with ≥3 linked cases. We calculated the effective reproduction number (R) to assess changes in transmissibility and reviewed molecular epidemiology data.

Results

During 2001-2019

SUBMITTER: Mathis AD 

PROVIDER: S-EPMC11288340 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature