Wiener klinische Wochenschrift
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An outbreak of hepatitis A was observed in a shelter for the homeless in Vienna with about 200 inhabitants. Twenty-two cases occurred within a period of 6 months. ⋯ Nevertheless, 8 of these 102 "protected" persons showed signs of subclinical infection at subsequent follow up. Apart from these, 2 further cases of hepatitis A occurred among the non-immunised children at risk, whose parents had refused permission for serological investigation or immunoglobulin administration.