Yes, several viruses are actively circulating right now. As of late February 2026, influenza is the most widespread, with about 15.8% of tests coming back positive nationally. RSV (respiratory syncytial virus) is elevated and increasing in some regions, with a 9.1% positivity rate. COVID-19 activity is decreasing but still present in certain areas, at 3.8% positivity. Norovirus, the stomach bug, is also circulating, though at lower levels than last year.
What’s Circulating Right Now
Influenza A has been the dominant flu strain this season, though it’s starting to decrease in most parts of the country. Influenza B trends vary by region, so depending on where you live, you may be seeing a different mix. RSV, which tends to hit young children and older adults hardest, is still climbing in some areas even as the season winds down elsewhere.
COVID-19 hasn’t disappeared. Activity is declining nationally, but pockets of elevated transmission remain. The virus continues to evolve, with several subvariants being monitored by the World Health Organization, though none have been flagged as major threats beyond what’s already circulating.
On the stomach bug front, norovirus outbreaks have been notably lower this season. Between August 2025 and early February 2026, participating states reported 644 outbreaks, compared to 1,707 during the same window last year. That said, norovirus remains the leading cause of vomiting, diarrhea, and foodborne illness in the U.S., so it’s still out there.
How to Tell Which Virus You Might Have
The honest answer: you often can’t tell from symptoms alone, especially with respiratory viruses. COVID-19 and the flu share nearly identical symptoms, including fever, cough, sore throat, body aches, fatigue, runny nose, and headache. The CDC states plainly that testing is needed to confirm which one you have. Loss of taste or smell still leans toward COVID-19, but it’s less common with newer variants than it was earlier in the pandemic.
RSV typically starts with cold-like symptoms but can progress to wheezing and difficulty breathing, particularly in babies, toddlers, and adults over 65. In otherwise healthy adults, RSV often feels like a bad cold that lingers.
Norovirus is easier to distinguish. It hits fast with intense vomiting and diarrhea, sometimes both at once. Fever can accompany it, but the hallmark is the sudden, forceful gastrointestinal symptoms. Most people recover within one to three days, though dehydration is the main risk.
How Long Before Symptoms Show Up
The gap between exposure and feeling sick varies by virus. The flu typically takes one to two days. Rhinovirus, the most common cause of the ordinary cold, has a median incubation period of just under two days. Parainfluenza viruses take about two to three days. Adenovirus, which can cause cold symptoms, sore throat, or pink eye, has a longer window of roughly five to six days. COVID-19 generally takes two to five days, though some variants have been shorter.
This matters because you can spread most of these viruses before you even know you’re sick. RSV shedding can start three to four days before symptoms appear, and research published in the American Journal of Epidemiology found that 30% of household RSV transmissions happened before the infected person showed any signs of illness. Most RSV transmission events occur within the first seven days of household exposure.
How Long Recovery Takes
A standard upper respiratory infection, whether it’s a cold or mild flu, typically resolves in 7 to 10 days. A lingering cough can stick around for two to three weeks, which is normal and doesn’t necessarily mean you’re still contagious or getting worse. If a respiratory virus moves into the lungs and causes pneumonia, recovery stretches to two to four weeks for most people, longer for older adults or those with chronic health conditions.
Norovirus moves through your system faster. Most people feel significantly better within 48 hours, though fatigue and mild nausea can linger a day or two beyond that.
Managing Symptoms at Home
Since antibiotics do nothing against viruses, treatment is about controlling symptoms while your immune system does the work. For fever and body aches, over-the-counter pain relievers and fever reducers taken according to package directions are the standard approach. For congestion, a cool mist humidifier or saline nasal spray can help open things up without medication.
Hydration matters more than most people realize, especially with norovirus or any illness involving fever. You lose fluid faster than normal through sweating, vomiting, or diarrhea. Water, broth, and electrolyte drinks are all good options. Rest sounds obvious, but pushing through a viral illness often extends recovery time.
If you test positive for the flu or COVID-19 early enough, prescription antivirals may be an option. These work best when started within the first day or two of symptoms, so getting tested promptly matters if you’re in a higher-risk group.
Reducing Your Risk
The flu vaccine remains the most accessible tool for preventing severe influenza. Preliminary data from the 2024-2025 season shows vaccine effectiveness ranging from about 42% to 56% against outpatient flu illness in adults, and 32% to 59% in children and adolescents, depending on the study network. Those numbers may sound modest, but vaccinated people who do get the flu tend to have milder illness. Against flu-related hospitalization in adults, effectiveness was estimated at 41% to 55%.
Updated COVID-19 vaccines are available and recommended, particularly for older adults and people with underlying conditions. RSV vaccines are now available for adults 60 and older and for pregnant people to protect newborns.
Beyond vaccines, the basics still work. Handwashing with soap is especially important for norovirus, which is resistant to many hand sanitizers. Staying home when symptomatic, even for a day or two, cuts transmission significantly for all of these viruses. Good ventilation in indoor spaces reduces airborne spread of respiratory viruses, and masks remain effective in high-risk settings like crowded transit or healthcare facilities.
Signs That Need Medical Attention
Most viral infections resolve on their own, but certain symptoms signal that something more serious is happening. Difficulty breathing or shortness of breath, especially alongside a fever, can indicate a lower respiratory infection like pneumonia. A fever lasting more than 48 hours without improvement, persistent vomiting that prevents you from keeping fluids down, confusion or decreased alertness, and unexplained bruising or bleeding all warrant prompt medical evaluation.
In young children, watch for rapid breathing, refusal to drink fluids, and unusual sleepiness. In older adults, confusion can be an early sign of serious infection even before a high fever develops. For norovirus, the main danger is dehydration: if you notice very dark urine, dizziness when standing, or no urination for eight or more hours, you need fluids that may require medical help to replace.