Lab Worker Infected by Vaccinia Virus Infection Despite Recent Immunized

The US CDC reported:

Occupational exposures to orthopoxviruses in laboratories can result in infections. The most effective means of prevention are preexposure smallpox vaccination, training, and laboratory safety measures such as proper handling and disposal of needles. In addition, incident reporting and timeliness of seeking medical treatment for inadvertent exposures are critical components of laboratory response plans.