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I nfluenza still has significant morbidity and mortality in people over 65 years. The risk factors for death from influenza are age and underlying disease, and it is estimated that two-thirds of the population 65 years and over can be expected to have one or more chronic medical conditions. During influenza epidemics it is estimated that 80 per cent to 90 per cent of excess deaths are attributable to influenza or its complications'.doi:10.1071/nb91047 fatcat:nr6vk4zhjrgixhpndxmpgtvbrq