Seasonal influenza activity is elevated across Champaign County as cases continue to rise statewide and nationwide, according to the Champaign-Urbana Public Health District.
Illinois has reported at least two pediatric flu-related deaths this season, data from the Illinois Department of Public Health show. Nationally, there have been 32 pediatric deaths.
The Centers for Disease Control and Prevention wrote Friday that seasonal flu activity remains elevated nationally, but has decreased or remained stable for two consecutive weeks. It will continue to monitor for a common second period of increased cases.
CUPHD wrote in a press release earlier in January that a newly-emerged variant of influenza A, known as H3N2 subclade K, is the dominant strain circulating in the United States. Strains of the flu are named for different variations of specific proteins — hemagglutinin and neuraminidase — that are found on the surface of viral particles.
Influenza A and B viruses are responsible for most seasonal flu outbreaks each winter and are associated with higher hospitalization and mortality rates, according to IDPH.
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“Vaccination against flu and other seasonal respiratory illnesses remains the most effective protection against infection for everyone six months and older,” the public health district wrote in a statement.
The 2025-26 flu vaccine is designed to protect against three strains expected to circulate widely this season — influenza A H1N1, influenza A H3N2 and influenza B — and all vaccines available in the U.S. this season are formulated to target these three.
IDPH has a vaccine locator tool for those seeking vaccination in the state.
The district urged residents to take additional preventative measures, including frequent handwashing, covering coughs and sneezes and avoiding close contact with people who are sick.
Common symptoms of seasonal influenza include fever, chills, body aches, headaches, fatigue, congestion, coughing and sore throat.
“Healthy individuals usually recover from flu without complications,” CUPHD wrote.
It added that people who become ill should stay home, rest and drink fluids to prevent further spread.
Stomach illness, such as vomiting and diarrhea, can occur, CUPHD wrote, but is not typical of influenza. Stomach illness is usually the result of a gastrointestinal illness such as norovirus or food poisoning.
Young children, older adults, pregnant people and those with certain medical conditions are at higher risk for severe flu-related complications. Health officials recommend individuals in high-risk groups contact a health care provider early if symptoms develop.
