An Elevated 2025–2026 Flu Season: What Families, Older Adults, and High-Risk Patients Should Do Now

Flu activity is still elevated in March. Here’s the practical takeaway.

As of mid-March 2026, national surveillance shows that influenza activity remains elevated in many parts of the United States. According to the CDC’s FluView Weekly Report, outpatient visits for flu-like illness, hospitalizations, and geographic spread remain above baseline in multiple regions.

For families and high-risk patients, this means flu season is not over. Vaccination, early testing, and prompt antiviral treatment still matter—especially for older adults, young children, pregnant people, and anyone with chronic health conditions.

What “elevated” flu activity actually means

When the CDC describes flu activity as elevated, it reflects several data streams: the percentage of doctor visits for influenza-like illness, laboratory-confirmed cases, hospital admission rates, and deaths attributed to pneumonia and influenza.

In a typical season, flu peaks between December and February. Some years, activity declines steadily by March. In others, including the current 2025–2026 season, significant transmission continues into early spring.

Elevated activity does not mean everyone will get severely ill. But it does mean:

The virus is still circulating widely.
Household exposure risk remains real.
Hospitals may still be managing substantial numbers of flu-related admissions.

For high-risk groups, the difference between a mild illness and hospitalization often depends on how quickly treatment begins.

Who is most at risk of serious flu complications?

The CDC identifies several groups at higher risk for severe influenza outcomes, including hospitalization and death. These include:

Adults age 65 and older
Children under 5 (especially under 2)
Pregnant people and those up to two weeks postpartum
People with chronic conditions such as asthma, COPD, heart disease, diabetes, kidney or liver disease
People with weakened immune systems
Residents of nursing homes or long-term care facilities

Older adults consistently account for a large share of flu hospitalizations each season. Even in years when younger adults have high infection rates, severe outcomes disproportionately affect people over 65 and those with underlying medical conditions.

Vaccination still helps—even in March

A common question this time of year is: “Is it too late to get a flu shot?”

The CDC’s vaccine effectiveness overview makes clear that flu vaccination reduces the risk of severe illness, hospitalization, and death—even in seasons when the vaccine is not a perfect strain match.

While protection is strongest in the months after vaccination, getting vaccinated mid-season can still provide benefit if flu viruses are actively circulating. It takes about two weeks for immunity to build.

For older adults, high-dose or adjuvanted flu vaccines are recommended when available. Even if infection occurs after vaccination, illness is often milder than in unvaccinated individuals.

Vaccination also helps protect vulnerable family members, including infants who are too young to be fully vaccinated.

Why early antiviral treatment matters

The CDC’s influenza antiviral treatment guidance emphasizes that antiviral medications work best when started within 48 hours of symptom onset. However, treatment can still help later in high-risk or hospitalized patients.

Common outpatient antiviral options include:

Oseltamivir (Tamiflu)
Baloxavir (Xofluza)
Zanamivir (in selected patients)

These medications do not “cure” flu instantly, but they can:

Shorten illness duration
Reduce the risk of complications such as pneumonia
Lower the likelihood of hospitalization when started promptly

High-risk patients should contact a healthcare provider as soon as flu symptoms begin rather than waiting several days to see if symptoms improve.

Symptoms to watch for—and red flags

Typical flu symptoms include:

Sudden fever or chills
Cough and sore throat
Headache and body aches
Fatigue
Sometimes vomiting or diarrhea (more common in children)

Most people recover at home with rest and fluids. But urgent medical care is needed for:

Trouble breathing or shortness of breath
Chest pain
Confusion or sudden dizziness
Persistent high fever
Symptoms that improve, then worsen again

In infants, poor feeding, fewer wet diapers, or difficulty waking are warning signs. In older adults, confusion or sudden weakness may be the first sign of serious illness.

What families should do right now

With flu activity still elevated, practical prevention steps remain worthwhile:

Stay home when sick and return only after fever has resolved for at least 24 hours without medication.
Wash hands frequently and improve ventilation when possible.
Consider masking in crowded indoor settings, especially if you or a family member is high risk.
Test early if symptoms develop, particularly in high-risk individuals.
Call promptly about antiviral treatment if eligible.

Families caring for older relatives or immunocompromised members may want to be especially cautious about visitors with respiratory symptoms.

Common misconceptions this late in the season

“It’s spring, so flu season must be over.”
Not necessarily. Flu seasons vary, and activity can persist into March or April.

“If I’m healthy, I don’t need to worry.”
Healthy adults often recover well, but they can transmit flu to vulnerable people.

“Antivirals are only for hospitalized patients.”
Outpatient treatment is specifically recommended for high-risk patients and should start early.

What remains uncertain

Flu seasons are unpredictable. Strain dominance can shift, regional patterns vary, and late-season waves sometimes occur. Vaccine effectiveness estimates for the current season may evolve as more data are analyzed.

What is consistent year after year is that early treatment and vaccination reduce severe outcomes—particularly in older adults and people with chronic illness.

What this means for readers

If you are 65 or older, pregnant, managing a chronic condition, or caring for someone who is, do not assume the risk has passed just because winter is ending.

In mid-March 2026, elevated flu activity still translates into real risk for hospitalization in vulnerable groups. Vaccination can still provide protection, and starting antivirals quickly can prevent complications.

The most important step right now is simple: if symptoms start, act early.

Sources

This article is for general informational purposes only and is not medical advice. Research findings can be early, limited, or subject to change as new evidence emerges. For personal guidance, diagnosis, or treatment, consult a licensed clinician. For current outbreak or public health guidance, follow your local health department, the CDC, or another relevant public health authority.