Every year as the summer winds down and school resumes, we all know that flu season is just around the corner. But this year, our annual flu season will start up while we’re still in the midst of the COVID-19 pandemic.
You’ve probably heard that COVID-19 and the flu share a lot of the same symptoms. And maybe you’re even feeling a little under the weather right now. So, how do you tell the difference between COVID-19 symptoms and flu symptoms? The short answer is: It can be tricky. But we’re here to help.
The only way to truly diagnose whether you have the flu or COVID-19 is through testing. But below we provide an overview of both viruses, similarities and differences between symptoms, when you should get care, and more.
COVID-19 vs. the flu: What’s the difference between these two viruses?
The flu and COVID-19 are both highly-contagious respiratory illnesses, but they’re caused by different viruses.
The flu is caused by influenza viruses – usually Influenza A or Influenza B viruses. These are the viruses we experience during our annual flu season.
There are a lot of influenza viruses out there – and flu vaccines have been around since the mid-1940s. Each year, specific flu vaccines are recommended to fight the strains of influenza that research indicates will be the most common that season. So, when you make a flu shot appointment this year, you’ll get the vaccine chosen for the 2020-2021 flu season.
COVID-19 is caused by a new coronavirus called SARS-CoV-2. Our bodies had never experienced this type of coronavirus before the beginning of the pandemic – which means our bodies haven’t had a chance to build antibodies to fight it. There is no COVID-19 vaccine yet, but scientists and researchers are working on it.
Can the flu turn into COVID-19?
No. The flu cannot turn into COVID-19. And COVID-19 cannot turn into the flu. Again, these two illnesses are caused by different viruses.
Is it possible to have COVID-19 and the flu at the same time?
Yes. It is possible to be infected with the flu and COVID-19 at the same time.
How are symptoms of COVID-19 different from the flu?
First, let’s talk about the similarities between COVID-19 symptoms and flu symptoms
All respiratory illnesses share some similar symptoms. That’s because your respiratory system is in charge of helping you breathe, and includes your airways, lungs and blood vessels. So, when bacteria or viruses get in, the whole system can be affected and cause similar symptoms.
The most prominent symptoms that COVID-19 and the flu have in common include:
- Fever (of more than 100 degrees Fahrenheit)
- Muscle pain and body aches
- Fatigue (extreme tiredness or lack of energy) and weakness
- Nausea or vomiting (more common in children than adults)
- Diarrhea (more common in children and adults)
Because symptoms are so similar – and can vary from person to person – the only way to confirm whether it’s COVID-19 or influenza is through testing. If you or a loved one is experiencing any of these symptoms, don’t delay getting care.
We offer virtual care options to make it easy and convenient for you to get a diagnosis and treatment plan. When it comes to COVID-19 testing , HealthPartners has several drive-up testing sites across the Twin Cities.
Do you have COVID-like or flu like symptoms? Get the care you need.
Now, let’s look at how COVID-19 and flu symptoms are different
We’re learning more about COVID-19 every day. And while there are many similarities with flu symptoms, there are some specific differences that have been identified so far, including:
- Symptom onset – The flu comes on suddenly. Usually flu symptoms appear anywhere from one to four days after infection. COVID-19 symptoms can be more gradual. While COVID-19 symptoms can develop as early as two days after you’re infected, the Centers for Disease Control and Prevention (CDC) says five days after infection is typical. Plus, it’s possible to be infected with COVID-19 but not show any symptoms for up to 14 days.
- Cough type and severity – The flu usually causes a mild, dry cough, whereas COVID-19 cough symptoms are more severe. When you have COVID-19, coughs are usually dry, persistent and can leave you short of breath.
- Unique symptoms – COVID-19 symptoms that don’t typically overlap or are less common with the flu include:
- Shortness of breath or difficulty breathing
- Runny or stuffy nose
- Sore throat
- Repeated shaking with chills
- New and sudden loss of taste or smell
- Combination of symptoms – The possibility of COVID-19 is characterized by at least two of its symptoms being present, whereas any one common flu symptom could be an indicator of the virus.
Do COVID-19 or flu symptoms differ between adults and children? Men and women?
We’re often asked if flu symptoms in children are different than in adults. And this has become one of the most common questions about COVID-19.
Generally speaking, COVID-19 symptoms and influenza symptoms are the same for men and women – young or old. But there are a couple things to note when it comes to symptoms in children.
Gastrointestinal issues are more common in kids
For both COVID-19 and the flu, when vomiting, nausea or diarrhea happens, it’s usually more common in children than adults. This also means that the risk of dehydration can increase. So, parents should watch for signs of dehydration such as dry mouth, no tears when crying, or no urine for 8 or more hours.
COVID-19 has been linked to another condition in kids
When it comes to COVID-19, adults make up most of the known cases to date. However, some children have developed what’s called multisystem inflammatory syndrome (MIS-C). MIS-C is a condition where different parts of the body (not just the respiratory system) become inflamed. So, in addition to common COVID-19 and flu symptoms like fever, fatigue, vomiting or diarrhea, other symptoms can include abdominal pain, neck pain, rash and bloodshot eyes.
Right now, information on this condition is limited, but the CDC is working closely with local health departments to learn more. If you want to learn more about the condition, we encourage you to visit the CDC’s MIS-C information page.
What about common cold symptoms vs. flu or COVID-19 symptoms? How are they different?
You may be thinking: Is it a cold or the flu? Is it a cold or COVID-19? How do I tell the difference?
One of the main differences in common cold symptoms compared to COVID-19 or the flu, is the type of cough. Usually, cold coughs produce phlegm or mucus, not a dry cough like COVID-19 or the flu.
In addition, symptoms like fever, muscle aches and extreme fatigue are pretty uncommon when you have a cold. You may get a little sore or feel a little more tired, but it’s much milder and goes away more quickly.
If you think you have the flu or COVID-19, testing is the only way to confirm your instincts. To get started, schedule a video visit or start a Virtuwell visit. This can help us understand your symptoms and determine if COVID-19 testing or influenza testing is the right next step.