How to Differentiate Between Influenza (Flu) and the Common Cold

Feb 27, 2025 Source: Cainiu Health
Disease description:

Recently, my wife started experiencing symptoms such as coughing, fever, and a runny nose. At first, we thought it was a common cold, but she didn't get better. Later, after being tested, we found out it was influenza A. Therefore, we would like to understand how to differentiate between influenza A and the common cold?

Doctor's answer (1)
Dr. Ren Yi

Influenza A refers to influenza caused by type A influenza virus. Both influenza A and the common cold are common respiratory diseases and share some similar symptoms. They can be differentiated based on pathogen, clinical symptoms, and disease severity.

1. Pathogen: The common cold is usually caused by various viruses, including rhinovirus, adenovirus, coronavirus, human metapneumovirus, respiratory syncytial virus, and others. Influenza A is specifically caused by the type A influenza virus, a particular type of influenza virus.

2. Clinical symptoms: The common cold mainly presents with upper respiratory tract symptoms, such as sneezing, nasal congestion, coughing, and sore throat. Fever is generally mild, and symptoms such as headache and muscle pain are also usually mild. Influenza A often presents with high fever, with body temperature reaching 39°C or higher, and may be accompanied by headache, muscle pain, fatigue, and other symptoms.

3. Disease severity: The common cold typically has a mild course and most cases recover spontaneously, with serious complications being uncommon. Influenza A is more likely to lead to complications such as viral myocarditis and pneumonia, and severe cases may threaten life due to complications like respiratory failure.

Regardless of whether it is influenza A or the common cold, maintaining good personal hygiene habits, such as frequent hand washing, wearing masks, getting adequate rest, and sufficient fluid intake, is important to help the body recover.