A new study suggests that some people infected by the monkeypox outbreak in 2003 were protected by previous smallpox vaccinations. This finding could prove beneficial in the event of a bioterrorism attack, researchers say.

The monkeypox outbreak made 72 people ill in several Midwestern states, but did not cause any fatalities

Officials announced Tuesday, a pet hamster blamed for spreading a virus that killed three transplant patients in April, was traced to an Ohio-based distribution center, which supplies hamsters to pet stores across the East Coast.

State and federal investigators quarantined the distribution center Monday, and plan on testing the animals for the virus, in hopes of tracing its origin