Washington, D.C.—Influenza cases in the United States are on the rise this December, following a particularly severe flu season last year, according to the Centers for Disease Control and Prevention. Health officials are urging residents to get vaccinated as concerns grow about the flu’s impact amidst rising infections.

The CDC has reported over 3,100 deaths due to the flu in the year leading up to August 2025, highlighting the virus’s ongoing threat. Epidemiologists are examining whether the spike represents an alarming trend for the current flu season or simply a concentrated outbreak of cases this December.

Jennifer Nuzzo, a public health expert at Brown University, stresses the urgency of vaccination, particularly for vulnerable populations such as children and the elderly. She advocates for proactive measures to combat the flu and noted the importance of vaccination in mitigating the impact of the disease.

This year’s flu outbreak follows the 2024-2025 season, which was unprecedented in its severity since 2018, involving 279 pediatric deaths, the highest figure reported during such epidemics. The earlier onset of flu cases across Europe, attributed to a new subclade, K, has set a concerning precedent for the U.S. as well.

By December 20, there were around 7.5 million reported flu cases in the United States, along with 81,000 hospitalizations—a 25% jump from the previous week, according to the CDC’s estimates. The reports indicate that 32 states are experiencing “high” or “very high” levels of flu activity, indicating a widespread outbreak.

Nuzzo remarked on the challenges presented by the rapid spread of the virus, suggesting that simultaneous outbreaks may overwhelm healthcare systems. “The current surge presents unique difficulties for hospitals, as they may struggle to accommodate the influx of patients needing care at the same time,” she said.

Moreover, the cancellation of a public vaccination campaign by the CDC under its health secretary has raised concerns about vaccination rates. Approximately 130 million flu vaccine doses were distributed by early December, a notable decline of 13 million compared to the same time last year. Experts worry this might translate to fewer people getting vaccinated.

Nuzzo expressed disappointment at the lack of a concerted effort to encourage vaccinations, especially following a record-setting flu season for children. “It’s perplexing that we enter this season without a strong plan for vaccination promotion, despite indications that we could face a challenging flu season,” she added.

As residents may question the effectiveness of vaccines against the new variant, Nuzzo reassured the public that while efficacy could be lower, receiving the vaccine is still critical for protection. “Even if the new vaccine offers reduced protection, it is likely to shield you from severe illness,” she explained.

It’s also essential for people to be informed about the availability of at-home flu tests at local pharmacies, according to Nuzzo. Prompt testing can lead to timely access to antiviral medications that are most effective when administered soon after symptoms begin.

With these elements in mind, health officials continue to advocate for vaccinations and awareness around flu prevention, seeking to mitigate the toll of what could be a particularly challenging flu season ahead.