BMJ · 1995 · 57 citations · 3 references
Public HealthInfectious DiseasesDisease SurveillanceEpidemiologyVirologyHealth SurveillanceInfectious Disease SurveillanceInfluenza-like Illness SurveillanceRespiratory SurveillanceSurveillance MethodsSeasonal Influenza SurveillanceSeasonal Morbidity VariationVirological Diagnosis
VI 5 0 0 5 10 15 Time (weeks) Patern of stair use among men and women during study.Values are
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