A pertussis outbreak associated with social isolation among elderly nuns in a convent.

Mertens, Paul L J M; Borsboom, Gerard J J M; Richardus, Jan Hendrik · Clin Infect Dis · 2007

retrospective_cohort · Level III

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Abstract

The pertussis incidence during an outbreak in a convent in The Netherlands in 1992 was higher among 75 retired (unvaccinated) nuns (60%) than among 24 staff members (8%) and was higher among 9 nuns with only a convent career (100%) than among 66 nuns who had a career outside of the convent (55%). The pertussis incidence increased with duration of social isolation but not with age.

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