An abstract presented at ID Week in Atlanta recently paints a grim picture of the evolution of hepatitis A transmissions. Between 2007 and 2017, the incidence of hepatitis A attributed to outbreaks (as opposed to common-source exposure) increased steadily—to the point that in 2017, 43% of hep A infections were associated with outbreaks, compared with only 5% between 2007 and 2011. In the past, large community outbreaks were most likely to be associated with asymptomatic …
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