Definition:
The lesion produced by vaccination is contagious beginning about 4 days after vaccination and lasting until the site has completely healed. It is possible to spread the virus to other sites of the body, other people, or other surfaces. This risk can be reduced by using breathable bandages, not scratching the immunization site, and frequently washing hands.

Spread of Vaccinia After Vaccination
The site of the smallpox vaccination is contagious.
This person inoculated himself 36 times from wearing the shirt of a friend who had received the vaccine.
Related Resources:
The Smallpox Vaccine
Find out what you need to know about the smallpox vaccine.
Smallpox in the News
The latest update of the smallpox controversy in the news.
Smallpox - The Disease
Find out more about what causes smallpox and what the rash looks like.
The History of Smallpox
Learn more about the fascinating history of the rise and fall of smallpox.
The Smallpox Vaccine Decision
Should you get the smallpox vaccination or not? Find out pros and cons here.

