The following data were obtained from the Admissions and Death Registers at Kingston General Hospital (KGH) for investigation during the research project. Within the Registers, cases of influenza were often associated with other diseases, most frequently pneumonia. If reference to ‘influenza’ was made in the patient’s Reason for Admittance, that individual was included in the cohort being studied. With such a high incidence of pneumonia developing from influenza during the Spanish flu, those with ‘pneumonia’ were also included in the cohort. However, because pneumonia may also develop from a myriad of conditions unrelated to the flu, diagnoses of ‘pneumonia and other non-influenzal disease’ were not included (e.g., anemia and pneumonia).