High impact of molecular surveillance on hepatitis A outbreak case detection in Sweden: a retrospective study, 2009 to 2018

Fifty-five percent (n = 542/990) of the notified hepatitis A cases were referred to the Public Health Agency of Sweden for typing and 447 (45%) were sequenced successfully. The combination of molecular and epidemiological data revealed 23 potential outbreaks comprising 201 cases.The results show routine sequence-based typing detects outbreaks, promotes timely outbreak investigations and facilitates international collaboration. Eurosurveillance

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