Ring vaccination for smallpox
Ring vaccination is a disease-control strategy that was used to control smallpox until the last naturally occurring case in 1977. When an infection was diagnosed, all people who were or may have been exposed were identified and vaccinated. Then, a second "ring" of people who may have been exposed to the first ring were also identified and vaccinated.
Many disease-control experts support ring vaccination as an alternative to mass vaccination of the Canadian public.
| Author: | Debby Golonka, MPH Carrie Henley | Last Updated: May 1, 2007 |
| Medical Review: | William M. Green, MD - Emergency Medicine Anne C. Poinier, MD - Internal Medicine W. David Colby IV, MSc, MD, FRCPC - Infectious Disease Christine Hahn, MD - Epidemiology | |
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