Several respiratory viruses are circulating across the United States right now, with influenza leading the pack. For the week ending February 21, 2026, CDC surveillance data shows influenza positivity at 17.9%, RSV at 8.6%, and COVID-19 at 4.3%. But the “cold” you or your family caught could be any one of at least half a dozen different viruses, each with its own timing, symptoms, and recovery arc.
The Viruses Driving Most Illnesses Right Now
Winter is peak season for several respiratory viruses at once, which is why it can feel like everyone around you is sick with something slightly different. Influenza is currently the dominant circulating virus, which means that lingering cough and body aches you’re dealing with may not be a cold at all. RSV, which peaked in late December at 11% positivity, is still circulating at meaningful levels. COVID-19 activity is relatively low compared to its summer 2024 peak of nearly 18%, but it remains in the mix.
Rhinoviruses, the single most common cause of what people call “a cold,” follow a different calendar than flu and RSV. They peak twice a year: once in early fall (hitting about 30% positivity in September) and again in spring (around 22% in May). That means rhinovirus activity in midwinter is lower than its seasonal highs, but these viruses never disappear entirely. Common human coronaviruses (not COVID-19, but their milder relatives like OC43 and HKU1) peaked in late February at about 8.3% positivity, making them another likely culprit for winter colds right now.
Notably, adenovirus has not shown elevated activity this season, so it’s a less likely cause of whatever is going around your office or your child’s school.
How to Tell What You Might Have
Without a lab test, you can’t know for certain which virus you’ve caught. But the symptom patterns differ enough to give you reasonable clues.
A straightforward cold, most often caused by rhinovirus or a common coronavirus, sticks to the upper respiratory tract: runny or stuffy nose, sneezing, mild sore throat. Fever is rare, muscle aches are absent, and you generally feel annoyed rather than flattened. These colds typically resolve in less than a week.
COVID-19’s most common symptoms have shifted over time. Right now, the hallmarks are a runny or stuffy nose, headache, and sore throat. That overlap with a regular cold is why so many people miss it. The distinguishing features: COVID-19 usually causes headache and fatigue, while a plain cold rarely does. Loss of taste or smell, though less common than in earlier variants, still points strongly toward COVID-19 when it appears. Fever, cough, and diarrhea are possible but not guaranteed.
Influenza hits harder and faster. Body aches, high fever, and exhaustion that come on within hours rather than building gradually over a day or two are the classic signs. If you went from fine to miserable in an afternoon, flu is the most likely explanation this time of year.
RSV and HMPV: The Ones People Overlook
RSV gets attention mainly as a threat to infants and older adults, but it infects people of all ages and can feel like a bad cold in otherwise healthy adults. In young children and seniors, it can progress to bronchiolitis or pneumonia. RSV activity is declining from its December peak but remains significant.
Human metapneumovirus, or HMPV, is less well known but follows a similar pattern. It causes cough, fever, nasal congestion, and sometimes shortness of breath. It peaked in mid-April last season at 7.4% positivity, so its biggest wave typically comes later in winter and into spring. Like RSV, HMPV can progress to bronchitis or pneumonia, particularly in young children, older adults, and people with weakened immune systems.
Parainfluenza and Enterovirus D68 in Children
Parainfluenza viruses deserve a mention, especially for parents. There are four types, and they behave differently. Types 1 and 2 are the leading cause of croup, that distinctive barking cough that sounds alarming in toddlers. Type 3 is more associated with infections deeper in the lungs. Parainfluenza activity peaks twice: once in late fall and again in spring, with the spring peak (around 9.4% in late May) typically being the larger one.
Enterovirus D68 made headlines in 2024 when it became the most frequently reported enterovirus type, accounting for about 62% of enterovirus detections through the national surveillance system. EV-D68 typically causes cold-like symptoms in most children, but in rare cases it has been linked to acute flaccid myelitis, a serious condition affecting the spinal cord that causes sudden weakness in the arms or legs. The last major wave of AFM cases occurred in 2018. EV-D68, like rhinovirus, tends to circulate most heavily in late summer and fall rather than midwinter.
Why You Might Get Sick More Than Once
Because so many different viruses circulate on overlapping but distinct schedules, it’s entirely normal to catch two or three respiratory illnesses in a single season. A rhinovirus cold in September, influenza in January, and a common coronavirus cold in February would be an unlucky but not unusual winter. Each infection provides some short-term immunity to that specific virus, but it does nothing to protect you against the others waiting in line.
Children in daycare or school settings are especially vulnerable to stacked infections because they encounter more people in close quarters and have less built-up immunity. Adults living with young children often find themselves catching viruses they’d otherwise avoid.
What Testing Looks Like
If your symptoms are mild and manageable, you probably don’t need a test. But if you’re wondering whether you have COVID-19 or flu specifically, both have treatments that work best when started early, which makes testing worthwhile. Home COVID-19 tests remain widely available. Flu testing is typically done at a doctor’s office or urgent care.
For more complicated cases, clinics can run a respiratory panel that checks for a dozen or more viruses at once: influenza A and B (including subtypes), RSV, parainfluenza types 1 through 3, HMPV, rhinovirus, and adenovirus. These panels are most commonly used for people sick enough to need medical care, not for every sniffle, but they’re the reason surveillance data can track all these viruses simultaneously.
Practical Recovery Expectations
Most common colds clear up in under a week. Influenza typically takes one to two weeks for full recovery, though the worst symptoms usually break within five to seven days. COVID-19 varies widely, but most people with mild cases feel better within a week to ten days. RSV and HMPV can linger longer, especially the cough, which sometimes hangs on for two to three weeks even after the infection itself has resolved.
The biggest practical difference between all these viruses isn’t the symptoms during the illness. It’s whether early treatment can change the course. For influenza and COVID-19, antiviral treatments exist and work best within the first day or two of symptoms. For everything else on this list, recovery is a matter of rest, fluids, and time.