Past exposure to vaccines and subsequent risk of Alzheimer's disease

From *Laval University Geriatric Research Unit, Centre d'hébergement Saint-Augustin du Centre hospitalier affilié universitaire de Québec, Beauport, Que.; †the Department of Social and Preventive Medicine, Université Laval, Sainte-Foy, Que.; ‡the Department of Epidemiology and Community Medicine, University of Ottawa, Ottawa, Ont.; §Surveillance and Risk Assessment Division, Centre for Chronic Disease Prevention and Control, Health Canada, Ottawa, Ont.; and ¶the Centre de santé publique de Québec, Quebec City, Que.

From *Laval University Geriatric Research Unit, Centre d'hébergement Saint-Augustin du Centre hospitalier affilié universitaire de Québec, Beauport, Que.; †the Department of Social and Preventive Medicine, Université Laval, Sainte-Foy, Que.; ‡the Department of Epidemiology and Community Medicine, University of Ottawa, Ottawa, Ont.; §Surveillance and Risk Assessment Division, Centre for Chronic Disease Prevention and Control, Health Canada, Ottawa, Ont.; and ¶the Centre de santé publique de Québec, Quebec City, Que.

From *Laval University Geriatric Research Unit, Centre d'hébergement Saint-Augustin du Centre hospitalier affilié universitaire de Québec, Beauport, Que.; †the Department of Social and Preventive Medicine, Université Laval, Sainte-Foy, Que.; ‡the Department of Epidemiology and Community Medicine, University of Ottawa, Ottawa, Ont.; §Surveillance and Risk Assessment Division, Centre for Chronic Disease Prevention and Control, Health Canada, Ottawa, Ont.; and ¶the Centre de santé publique de Québec, Quebec City, Que.

From *Laval University Geriatric Research Unit, Centre d'hébergement Saint-Augustin du Centre hospitalier affilié universitaire de Québec, Beauport, Que.; †the Department of Social and Preventive Medicine, Université Laval, Sainte-Foy, Que.; ‡the Department of Epidemiology and Community Medicine, University of Ottawa, Ottawa, Ont.; §Surveillance and Risk Assessment Division, Centre for Chronic Disease Prevention and Control, Health Canada, Ottawa, Ont.; and ¶the Centre de santé publique de Québec, Quebec City, Que.