Is it a Cold, the Flu, or COVID-19
Colds, the flu, and COVID-19 are all respiratory illnesses caused by different viruses. While they can cause similar symptoms, there are some key differences between them. The flu and COVID-19 have more symptoms in common than they do with colds. In general, it is difficult to tell the difference between flu and COVID-19 based on symptoms alone. Specific testing will identify if symptoms are caused by the flu or COVID-19. In some cases, a person can have more than one respiratory illness at the same time.
All three illnesses are caused by viruses that spread from person to person through droplets from the nose and mouth. They can all cause symptoms such as coughing, sore throat, and runny or stuffy nose.
Additional similarities between the flu and COVID-19 include:
- Fever and/or chills
- Headaches
- Muscle pain and body aches
- Fatigue or feeling tired and weak
- Shortness of breath or difficulty breathing
- Vomiting and diarrhea
The following are differences between a cold, the flu, and COVID-19:
- People with colds often have sneezing; it is less common with the flu and COVID-19.
- Vomiting and diarrhea may be more common in the flu
- Dry cough and change in or loss of taste or smell are symptoms more common to COVID-19.
In terms of severity, here are some differences among each condition:
- Colds are generally less severe and tend to resolve on their own within a few days to a week.
- The flu can range from mild to severe. It has the potential to cause complications such as pneumonia or worsening of existing health conditions. Most people the flu feel better within 2 weeks.
- COVID-19 has a higher risk of complications compared to the flu. It can lead to severe illness that may require hospitalization or result in death. Even younger and generally healthy individuals can experience severe illness from COVID-19. Most people with COVID feel better in about 2 weeks; however, some people have longer lasting symptoms.
When it comes to transmission, here are a few aspects:
- While all three respiratory illnesses spread from person to person through respiratory droplets, COVID-19 currently appears to be more contagious.
- Compared to the flu, people infected with the COVID-19 virus may take longer to show symptoms. For the flu, a person usually has symptoms from 1-4 days after being infected with the flu virus. For COVID-19, a person usually has symptoms from 2-5 days after infection, but this could be up to 14 days after infection.
- People infected with the COVID-19 virus may be contagious longer compared to those who have the flu.
Treatment may also vary among the three conditions:
- There is no specific treatment for the common cold. However, over-the-counter medications can help relieve symptoms.
- Antiviral medications are available to treat the flu both at home and in the hospital. Additionally, annual flu vaccines are recommended for prevention.
- Treatment for COVID-19 includes supportive care to manage symptoms. There are antiviral medications for treatment of people at risk for severe COVID-19 illness. COVID-19 vaccines have also demonstrated efficacy in preventing illness.
It's important to note that if you are experiencing symptoms of any respiratory illness, it's always best to consult with a healthcare provider for an accurate diagnosis and appropriate treatment.