Respiratory Virus Season 2026: Common Questions About Flu, COVID-19, and RSV

Practical takeaway: Flu, COVID-19, and RSV continue to cause illness across the United States each year. Vaccination (when eligible), staying home when sick, testing when appropriate, and early treatment for higher-risk people remain the main tools to reduce complications.

Each fall and winter — and sometimes into spring — respiratory viruses increase nationwide. The three that public health officials focus on most are influenza (flu), COVID-19, and respiratory syncytial virus (RSV). Guidance from the Centers for Disease Control and Prevention (CDC) and the Food and Drug Administration (FDA) continues to evolve as new data emerge.

Below are common questions readers have about respiratory virus season and what current U.S. public health guidance means for everyday life.

What viruses are circulating right now?

In the United States, influenza viruses, SARS-CoV-2 (the virus that causes COVID-19), and RSV circulate every year. According to the CDC, activity levels vary by region and by season, with peaks often occurring in fall and winter but sometimes extending beyond that window.

Other viruses — such as rhinoviruses (common cold viruses) and seasonal coronaviruses — also circulate, but flu, COVID-19, and RSV account for a large share of hospitalizations, especially among older adults, infants, and people with chronic health conditions.

What symptoms should people watch for?

These viruses can look similar at first. Common symptoms include:

Fever or chills
Cough
Sore throat
Runny or stuffy nose
Fatigue
Body aches
Headache

COVID-19 may also cause loss of taste or smell in some cases. RSV in infants and older adults may lead to wheezing, difficulty breathing, or decreased appetite. Flu can develop quickly and may cause more intense body aches and high fever.

Because symptoms overlap, testing may be the only way to confirm which virus is causing illness.

Who is at higher risk for severe illness?

According to the CDC, higher-risk groups include:

Adults age 65 and older
Infants and young children (especially under age 5 for flu and under 1 for RSV)
Pregnant people
People with chronic conditions such as heart disease, lung disease, diabetes, obesity, kidney disease, or weakened immune systems
Residents of nursing homes or long-term care facilities

Health equity matters here. Communities with limited access to care, crowded housing, or lower vaccination rates may experience higher hospitalization rates.

Are vaccines still recommended?

Yes. The CDC continues to recommend seasonal flu vaccination for most people 6 months and older. Updated COVID-19 vaccines are recommended for eligible age groups based on current FDA authorization and CDC guidance. RSV immunization options are also available for certain older adults, pregnant people (to protect newborns), and infants, based on federal recommendations.

These recommendations are based on ongoing safety monitoring and effectiveness data reviewed by federal advisory committees and the FDA. Vaccine protection is not perfect, but studies consistently show reduced risk of hospitalization and severe outcomes, particularly in higher-risk groups.

If you are unsure which vaccines apply to you or your child, a primary care clinician or pharmacist can review eligibility and timing.

Do vaccines have side effects?

Most side effects are mild and short-lived, such as soreness at the injection site, fatigue, headache, or low-grade fever. Serious adverse events are rare and are monitored through systems such as the FDA’s MedWatch and CDC’s vaccine safety programs.

People with a history of severe allergic reactions to vaccine components should discuss risks and benefits with a clinician.

When should someone get tested?

Testing may be useful if:

You are at higher risk for severe illness
You have symptoms and may qualify for antiviral treatment
You live with or care for someone at high risk
Your workplace or school requires confirmation

COVID-19 rapid antigen tests remain widely available. Flu and RSV testing are often performed in clinics, urgent care settings, or hospitals. Early testing can matter because antiviral treatments for flu and COVID-19 work best when started within the first few days of symptoms.

Are treatments available?

Yes. For influenza, prescription antiviral medications can reduce severity and duration if started early. For COVID-19, antiviral medications are available for eligible high-risk individuals and are most effective when begun soon after symptom onset.

RSV treatment is usually supportive — such as oxygen or fluids in severe cases — though preventive immunization options exist for specific groups.

Over-the-counter medications may help relieve symptoms like fever and congestion, but they do not treat the virus itself.

When should someone seek urgent medical care?

Seek emergency care right away for:

Difficulty breathing
Persistent chest pain or pressure
Confusion or difficulty staying awake
Blue or gray lips or face
Signs of dehydration (especially in infants and older adults)

Parents should watch for fast breathing, flaring nostrils, or chest retractions in infants and young children.

What about prevention beyond vaccination?

CDC guidance continues to emphasize layered prevention strategies, especially during high transmission periods:

Stay home when sick
Wash hands regularly
Improve indoor ventilation when possible
Wear a well-fitting mask in high-risk settings if you or someone around you is vulnerable
Cover coughs and sneezes

Workplaces, schools, and long-term care facilities may have additional policies based on local transmission levels.

How does oral health connect to respiratory infections?

Good oral hygiene does not prevent viral infection, but maintaining overall health — including dental care — supports immune function and reduces secondary complications. For example, people with chronic conditions such as diabetes (which is linked to both oral health and infection risk) may face higher risks of severe respiratory illness.

Routine dental visits and chronic disease management remain part of whole-person health during respiratory virus season.

What remains uncertain?

Respiratory viruses continue to evolve. Public health officials monitor:

Changes in circulating strains
Vaccine effectiveness each season
Hospitalization patterns
Emerging antiviral resistance

Recommendations may adjust based on new data. That does not mean prior guidance was wrong — it reflects how public health responds to updated evidence.

What this means for readers

For most healthy adults, respiratory infections will be uncomfortable but manageable at home. For infants, older adults, pregnant people, and those with chronic conditions, early prevention and timely treatment can make a meaningful difference.

If you have symptoms and are at higher risk, contact a healthcare professional promptly to ask about testing and treatment options. Stay current with recommended vaccinations, and pay attention to updates from trusted sources like the CDC and FDA.

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.

Sources

Centers for Disease Control and Prevention (CDC) – Respiratory Virus Guidance and Vaccine Recommendations
U.S. Food and Drug Administration (FDA) – Vaccine Authorizations and Safety Monitoring
MedlinePlus (NIH) – Influenza, COVID-19, and RSV Overviews