Of greater concern to virologists is a "shift," which occurs when a radically different strain enters people.
But extensive surveillance at the time found no reported cases in humans, leading scientists to believe the H5 virus was not readily transmitted to people.
Virologist Virginia Hinshaw, dean of the Graduate School and a UW-Madison influenza expert, said there are 15 different types of influenza distinguished by variations in their surface proteins.
Virologists who work on researching dangerous organisms, such as Ebola or AIDS must take special safety precautions, such as wearing protective suits and working in biohazard areas, restricted only to these scientists.
Virologists are usually well organized, enjoy working in the laboratory with equipment and performing tasks that require precision.
Virologists with PhDs may conduct and lead individual and group research projects and teach in universities, manage hospital (clinical) diagnostic virology laboratories or advance to senior scientific appointments in government or industry.