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The County has announced that the hepatitis A outbreak which resulted in 592 cases and 20 deaths has officially ended.
The conclusion is based on the fact that it has been 100 days since the onset of illness of the last outbreak-associated case, which is two incubation cycles for hepatitis A. Two incubation cycles with no new outbreak-related cases is generally considered sufficient time to declare the outbreak over.
San Diego County officials identified the outbreak in March 2017, and were able to later trace some cases back to November 2016. The County declared a local health emergency on September 1, 2017, which ended on January 23, 2018.
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