There were a record number of flu hospitalizations in Colorado last year. More than 4,600 people were hospitalized due to the flu during the last flu season.
Several factors contributed to a spike in hospitalizations, one of which is the strain, said Dr. Rachel Herlihy, epidemiologist for the Colorado Department of Public Health.
"And last year the predominant strain was a virus called H3N2,” said Herlihy. “And that strain of influenza is really known to cause higher rates of hospitalization and more severe illness, particularly in older adults.”