Norovirus shedding in aged-care facility residents can continue for nearly a month after acute illness.
Prolonged shedding may extend isolation needs in aged-care residents; leaves open optimal control durations and requires prospective validation.
Norovirus genogroup II excretion during an outbreak of gastroenteritis was investigated in an aged-care facility. Viral shedding peaked in the acute stage of illness and continued for an average of 28.7 days. The viral decay rate was 0.76 per day, which corresponds to a viral half-life of 2.5 days.
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Tu et al. (2008) studied this question.
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