Preventative measures
Immediately related elementsHow this works
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Controlling Infectious Diseases Â»Controlling Infectious Diseases
Diseases Â»Diseases
Smallpox Â»Smallpox
Preventative measures
Revaccination Â»Revaccination
Vaccination Â»Vaccination
Variolation / Inoculation Â»Variolation / Inoculation
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