COVID symptoms in 2025 look a lot more like a common cold than they did in 2020. The dominant Omicron-descended variants have shifted the typical illness toward upper respiratory symptoms, with stuffy or runny nose, cough, and fatigue now topping the list. Loss of taste and smell, once a hallmark sign, has become far less common. If you’re feeling sick and wondering whether it’s COVID, here’s what to look for.
The Most Common Symptoms Right Now
Data from the 2024-2025 respiratory season in the U.S. paints a clear picture of what a typical COVID infection looks like today. Among symptomatic adults who tested positive, 97.7% reported a stuffy or runny nose, 95.1% had a cough, and 92.2% experienced fatigue. That means nearly everyone with a confirmed case had all three.
The full list of recognized symptoms from the CDC includes:
- Congestion or runny nose
- Cough
- Fatigue
- Sore throat
- Headache
- Muscle or body aches
- Fever or chills
- Shortness of breath
- Nausea, vomiting, or diarrhea
- New loss of taste or smell
The order matters. Congestion, cough, sore throat, and fatigue are now the symptoms you’re most likely to notice first and feel most strongly. Fever still happens but isn’t as universal as it was with earlier variants. Digestive symptoms like nausea and diarrhea show up in a meaningful number of cases but remain less common than the respiratory ones.
What Changed From Earlier Variants
The biggest shift is the near-disappearance of taste and smell loss. Among vaccinated people infected with Omicron-lineage variants, loss of smell or taste dropped by 71% during the acute phase compared to earlier variants and by 95% at 90 days post-infection. If you caught COVID in 2020 or 2021, this symptom may have been your most memorable one. Today, it’s relatively rare.
Current variants also tend to hit the nose and throat harder than the lungs. Earlier strains were more likely to cause significant shortness of breath, pneumonia, and the kind of deep chest illness that sent people to the hospital. That still happens, but the center of gravity has moved upward in the respiratory tract. For most people, a 2025 COVID infection feels like a bad cold or mild flu, with heavy congestion, a scratchy throat, and a few days of real fatigue.
How It Differs From the Flu
The honest answer: you can’t reliably tell them apart by symptoms alone. The CDC states this directly. Fever, cough, body aches, fatigue, sore throat, and congestion are common to both. Testing is the only way to know for sure.
There are a few subtle differences worth knowing, though. COVID’s incubation period runs slightly longer, typically 3 to 6 days after exposure compared to 1 to 4 days for the flu. COVID also keeps you contagious longer. You can start spreading the virus 2 to 3 days before symptoms appear, and you remain contagious for an average of about 8 days after symptoms start. With the flu, contagiousness peaks in the first 3 days of illness. Loss of taste or smell, while less common than before, still points more toward COVID than flu when it does occur.
What Vaccination Changes About Symptoms
Vaccinated people get COVID, but their experience tends to be milder and shorter. At 30 days after infection, vaccinated individuals were 37% less likely to still have any symptoms compared to unvaccinated people. By 90 days, that gap widened sharply: only 8% of vaccinated cases still reported symptoms, versus 27% of unvaccinated cases.
Vaccination also reduces the number of simultaneous symptoms. Having five or more symptoms at once was about 63% less common in vaccinated individuals during the acute phase. Difficulty breathing specifically was 46% less common during active infection and 75% less common at the 90-day mark. Muscle aches, fatigue, chills, sleep problems, headaches, digestive issues, and cognitive difficulties were all less frequent and less severe in vaccinated people.
One important caveat: these protective benefits did not hold up as strongly for second infections. If you’ve already had COVID once, vaccination didn’t significantly reduce symptom severity during a reinfection.
Symptoms in Children
Kids with COVID most commonly develop fever and cough. Many also experience sore throat, runny nose, headache, fatigue, and gastrointestinal symptoms like vomiting or diarrhea. These symptoms overlap heavily with dozens of other childhood infections, which makes identifying COVID by symptoms alone especially difficult in children.
One notable pattern emerged during waves of Omicron transmission: a significant increase in croup among young children. Croup causes a distinctive barking cough and noisy breathing, and it spiked during periods when other viruses known to cause croup were declining. If your child develops that harsh, seal-like cough, COVID is worth considering alongside the usual suspects.
When to Test and What to Expect
Symptoms typically appear 3 to 6 days after exposure and last up to 10 days for most people, though some cases drag on longer. The current Omicron-lineage variants tend to have a shorter incubation period than the original strains.
If you develop symptoms, take a rapid antigen test right away. But don’t trust a single negative result. It can take 2 to 5 days (sometimes longer) for the virus to build up enough to register on a home test. The FDA recommends retesting at least 48 hours after a negative result. So if you test negative on day one of symptoms, test again on day three. Two negatives spaced 48 hours apart give you much more confidence than one.
Symptoms That Need Emergency Attention
Most COVID infections resolve on their own, but certain warning signs require immediate medical care: trouble breathing, persistent chest pain or pressure, new confusion, inability to stay awake, or a noticeable color change in your lips, nail beds, or skin (appearing pale, gray, or blue depending on your skin tone). These can signal that the infection is affecting your heart, lungs, or brain in ways that need urgent treatment.
When Symptoms Don’t Go Away
For some people, symptoms persist well beyond the initial illness. This is long COVID, and more than 200 different symptoms have been linked to it. The most commonly reported are fatigue, brain fog (difficulty thinking or concentrating), and post-exertional malaise, where physical or mental effort triggers a crash in energy and function. Neurological symptoms like headaches, dizziness, sleep problems, and pins-and-needles sensations are also frequently reported, along with digestive issues including diarrhea, stomach pain, and constipation.
Vaccination substantially lowers the risk of long-lasting symptoms. Among vaccinated people who caught Omicron variants, only 6% still reported any symptoms at 90 days, compared to 18% of vaccinated people who had caught pre-Omicron strains. The combination of newer variants and up-to-date vaccination appears to offer the best protection against symptoms that linger for months.