The changing prevalence of asthma [electronic resource] / D. Jarvis.
Material type:![Film](/opac-tmpl/lib/famfamfam/VM.png)
Animated audio-visual presentation with synchronized narration.
Title from title frames.
Contents: Measuring asthma prevalence in community studies -- Geographical variation in prevalence of disease -- Early studies showing an increase in disease -- More recent studies of time trends -- Possible reasons for changing prevalence of disease.
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Mode of access: World Wide Web.