COVID vs Flu vs Cold: When to Get Tested at Urgent Care
You wake up with a sore throat and congestion. By lunchtime, you've developed body aches and a fever. Is it just a cold? The flu? Or is it COVID-19?
The truth is, many respiratory illnesses begin with similar symptoms, making it difficult to know exactly what's causing you to feel sick. While most viral illnesses improve with rest, supportive care, and without complications, some situations call for testing. When symptoms overlap, COVID-19 and flu testing can provide answers that symptoms alone often can't.
At Urgent Care & Wellness Center, we evaluate a wide range of respiratory illnesses. Our physician-led team recommends appropriate testing and treatment after carefully assessing your symptoms, medical history, and physical examination.
In this article, we'll explain why respiratory illnesses often look alike, when testing may be helpful, and when it's time to visit urgent care or seek emergency medical attention.
Why Respiratory Illness Can Be Difficult to Tell Apart
COVID-19, influenza (the flu), and the common cold are all viral respiratory illnesses. Although they're caused by different viruses, they affect many of the same parts of the body, including the nose, throat, and airways.
As a result, many people experience similar symptoms during the first few days of illness, such as:
Sore throat
Cough
Fever
Nasal congestion
Runny nose
Fatigue
Body aches
COVID vs Flu vs Cold Symptoms: A Quick Comparison
While symptoms vary from person to person, the table below highlights some general differences between these illnesses.
Symptom | COVID-19 | Influenza (Flu) | Common Cold |
|---|---|---|---|
Fever | Common | Common | Less common |
Chills | May occur | Common | Uncommon |
Body aches | Common | Often significant | Usually mild |
Fatigue | Common | Often significant | Usually mild |
Sore throat | Common | Common | Common |
Cough | Common | Common | May occur |
Runny nose or congestion | May occur | Sometimes | Common |
Loss of taste or smell | Can occur | Rare | Rare |
Symptom onset | Gradual or sudden | Often sudden | Usually gradual |
While this comparison can be helpful, symptoms vary from person to person. It should not be used to diagnose yourself. Similar symptoms can occur with many respiratory illnesses, which is why medical evaluation and testing are the best way to determine what's causing your illness.
When Should You Get Tested for COVID or the Flu?
Not everyone with a cough or sore throat needs testing. However, there are situations where COVID or flu testing can provide valuable information and help guide your care.
Testing may be recommended if:
- Your symptoms started recently and suggest a viral respiratory illness.
- You've recently been exposed to someone diagnosed with COVID-19 or influenza.
- You have fever, body aches, or worsening respiratory symptoms.
- You have an underlying medical condition that increases your risk of complications.
- You're pregnant.
- Your employer, school, or another organization requires testing.
- Your provider needs to confirm the cause of your illness before recommending treatment.
It's also worth remembering that a negative home COVID-19 test doesn't always rule out infection, particularly if you're tested very early in your illness. If symptoms continue or worsen, medical evaluation may still be appropriate.
What Respiratory Testing May Be Recommended?
Rather than performing every available test, your provider will recommend testing based on your symptoms, examination, and how long you've been sick.
Depending on your evaluation, this may include:
Rapid COVID-19 testing to detect an active COVID-19 infection
Rapid Influenza A & B testing if your symptoms suggest seasonal influenza
PCR COVID-19 testing when a more sensitive test is needed
Rapid strep testing if your sore throat raises concern for strep throat rather than a viral illness
All of these tests are performed using a simple nasal or throat swab. Rapid test results are typically available during your visit, while PCR results are usually returned within 24–72 hours.
Signs It's Time to Visit Urgent Care for a Respiratory Illness
Many respiratory illnesses improve with rest, hydration, and supportive care at home. However, it's a good idea to seek medical evaluation if you experience:
Fever that continues or returns after initially improving
Persistent or worsening cough
Shortness of breath with normal daily activities
Symptoms that continue getting worse instead of better
Difficulty staying hydrated because of your illness
Symptoms that are interfering with work, school, or everyday activities
Concerns about your symptoms or uncertainty about whether testing is appropriate
At Urgent Care & Wellness Center, we provide same-day care for COVID-19, influenza, strep throat, the common cold, and other respiratory illnesses. Based on your symptoms and any testing performed, we'll recommend the treatment and follow-up care that's appropriate for your diagnosis.
Warning Signs That Need Emergency Medical Care
Some respiratory illnesses can become serious and require emergency treatment rather than urgent care. Call 911 or go to the nearest emergency room immediately if you experience:
- Difficulty breathing or severe shortness of breath
- Persistent chest pain or pressure
- New confusion or difficulty waking up
- Blue lips or face
- Severe dehydration or inability to keep fluids down
- Symptoms that rapidly worsen or become life-threatening
Infants, older adults, pregnant individuals, and people with weakened immune systems or significant underlying medical conditions should seek prompt medical evaluation if respiratory symptoms become severe or worsen unexpectedly.
Respiratory Testing & Treatment in Florida
If you're experiencing fever, cough, sore throat, congestion, body aches, or other symptoms of a respiratory illness, the physician-led team can help.
We provide same-day evaluations for COVID-19, influenza, strep throat, and other respiratory illnesses. When appropriate, we'll recommend the testing needed to identify the cause of your symptoms and provide the most appropriate treatment and guidance for your recovery.
To schedule your visit, please call (813) 336-3954 or book an appointment online.
