When cold and flu season rolls around or when there’s a spike in COVID cases, it’s not always easy to know what’s causing your symptoms. A sore throat, cough, fatigue, or fever could mean the flu, COVID-19, or a different viral illness altogether.
Although many respiratory viruses share overlapping symptoms, there are subtle differences that may help you figure out what’s going on. Here’s how to tell them apart, when to see a provider, and why early evaluation can make a difference.
Similar Symptoms, Different Causes
The flu and COVID-19 are both respiratory illnesses that spread easily from person to person. They can also cause many of the same symptoms, including:
- Fever or chills
- Cough
- Body aches
- Fatigue
- Headache
- Sore throat
- Congestion or runny nose
It’s also possible to have a mild or even asymptomatic case of either virus, which can make it difficult to know when to seek care.
Other illnesses, like RSV, strep throat, or even the common cold, can cause similar symptoms. That’s why diagnostic testing is often the most reliable way to determine what you’re dealing with.
Unique Signs to Watch For
While symptoms overlap, there are a few differences that may help point in the right direction:
- COVID-19 may include a loss of taste or smell, which is less common with other viruses.
- Flu symptoms tend to come on suddenly, often within a few hours.
- COVID-19 symptoms may appear more gradually over a few days.
- Strep throat usually causes a severe sore throat without coughing or sneezing, and may include swollen tonsils or white patches.
- RSV, especially in children, may present as wheezing, rapid breathing, or poor feeding.
However, these clues are not always clear. People can experience symptoms differently depending on age, underlying conditions, and immune response.
When to See a Provider
It’s important to seek evaluation if:
- You have a fever that lasts more than 2–3 days
- Breathing becomes difficult or labored
- Symptoms worsen instead of improving
- You are at higher risk for complications (older adults, pregnant individuals, or those with chronic health conditions)
- A child is unusually sleepy, has trouble breathing, or refuses to eat or drink
Getting evaluated early may allow for timely treatment options and help prevent spreading illness to others.
What Providers Can Do
During an evaluation, the provider may ask about your symptoms, exposure history, and any underlying health conditions. Depending on the situation, they may recommend:
- A rapid flu or COVID-19 test
- A throat swab to check for strep
- Basic vital checks, such as oxygen level or heart rate
- Advice on managing symptoms or when to follow up
Testing can offer clarity and help guide isolation decisions, especially if you live or work with others who may be more vulnerable.
Staying Safe Through Cold and Flu Season
The best way to reduce your risk is to take preventive steps:
- Wash your hands frequently
- Avoid close contact with those who are sick
- Stay home when you’re feeling unwell
- Keep up with recommended vaccines for flu and COVID
- Use masks in crowded indoor settings, if needed
When in Doubt, Get Checked
Flu-like symptoms can be frustrating and sometimes confusing. If you’re unsure whether it’s the flu, COVID-19, or something else, a provider can help identify the cause and guide you on what to do next.
In the Thornton, CO area, Advanced Urgent Care is available to evaluate symptoms, provide testing, and support your recovery through seasonal illnesses.