Colorado is experiencing an unprecedented flu season in 2025-26, with record hospitalizations and increasing emergency department visits. As of the week ending December 27, 2025, 831 individuals were hospitalized due to the flu, marking the highest number recorded since the state began tracking cases. Despite a slight decrease to 737 hospitalizations the following week, figures remain significantly higher than in previous years.
Impact of Flu Season in Colorado
Colorado ranks among the top five states nationally for flu activity. According to the Centers for Disease Control and Prevention (CDC), doctor visits for flu-like symptoms have reached a 30-year high. Emergency departments have seen massive inflows of patients, with the volume of visits peaking during the holiday season.
Characteristics of the 2025-26 Flu Season
- This flu season is marked by a rapid increase in cases and heightened contagion levels.
- Unlike typical flu symptoms, this year’s strain often includes vomiting and diarrhea.
- Patients are seeking emergency care in greater numbers, especially those with existing health conditions.
Emergency Medicine and Critical Care Physician at the University of Colorado shared that the current year stands out as one of the most challenging in 18 years of clinical practice. A notable surge in emergency visits has been primarily attributed to the flu, as hospitals encounter reduced capacity due to several factors.
Patient Demographics and Severity
Health officials note that children aged 5 to 17 account for the highest number of emergency visits, though they generally present milder symptoms compared to adults. Alarmingly, 17 pediatric flu-related deaths have been reported across the U.S., with eight occurring in the first week of January.
Young adults in their 20s are also feeling the illness’s impact, but serious complications remain less common among this group. Conversely, older adults and those with underlying conditions such as asthma, diabetes, or heart disease are at greater risk of severe symptoms and hospitalization.
Importance of Vaccination
Health experts continue to advocate for flu vaccinations, emphasizing their benefits in reducing symptom severity and hospitalization risks, particularly for individuals with pre-existing health conditions. Although vaccination may not provide complete immunity, it plays a critical role in managing the flu’s impact on vulnerable populations.
When to Seek Medical Attention
Individuals should seek immediate medical care if they experience difficulty breathing, severe chest pain, or unusual headaches. For those experiencing mild flu-like symptoms, rest and self-care are often sufficient unless underlying health conditions are present.
The Role of Wastewater Surveillance
Colorado utilizes wastewater testing as a primary method to monitor the prevalence of infectious diseases, including influenza. Recent tests indicate high flu levels while showing low instances of other viruses like RSV and COVID-19.
This approach allows health officials to obtain more comprehensive community data while reducing pressures on hospital resources. Testing remains vital for tracking public health trends, as it informs strategies for managing healthcare delivery effectively.
In conclusion, Colorado’s intense flu season highlights the need for continued public health vigilance, vaccination, and appropriate healthcare access. Residents are encouraged to practice caution, prioritize hygiene, and stay informed on health recommendations during this challenging time.
