Difference between common cold and covid-19 symptoms
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Symptom Frequency and Severity: COVID-19 vs. Common Cold
COVID-19 and the common cold share some symptoms, but there are important differences in how often and how severely these symptoms appear. COVID-19 most commonly causes cough (70%), fever (45–74%), muscle pain (29%), and headache (21%), while sore throat (12%) and runny nose (4%) are less frequent. In contrast, the common cold more often presents with headache (89%), runny nose (81%), muscle pain (94%), and sore throat (84%) . Fever is much more common in COVID-19 than in the common cold (74% vs. 40%) .
Unique Symptoms: Loss of Smell and Taste
Loss of smell (anosmia) and taste are much more prominent in COVID-19 than in the common cold. In COVID-19, anosmia often occurs without other nasal symptoms like runny nose or nasal congestion, which is different from the common cold where loss of smell is usually linked to nasal symptoms . Experiencing loss of smell is a strong indicator of COVID-19 rather than the common cold .
Symptom Order and Progression
The order in which symptoms appear can also help distinguish COVID-19 from the common cold. COVID-19 often starts with fever, followed by cough, while the common cold and influenza typically begin with a cough . This difference in symptom progression can help in early identification.
Changes Over Time and Variants
COVID-19 symptoms have changed over time, especially with new variants and increased vaccination. Early in the pandemic, COVID-19 often involved multiple organ systems, but more recent cases have shown a trend toward symptoms that resemble the common cold or flu, especially in mild cases Turabian2024Hagemann2022. However, loss of smell and taste remain more specific to COVID-19 Huart2020Hagemann2021.
Key Symptoms for Differentiation
Certain symptoms are more likely to indicate COVID-19 rather than the common cold. Increased severity of congestion, cough, shivering, and especially loss of smell are linked to a higher chance of COVID-19. On the other hand, a runny nose, sore throat, and fatigue are more likely with the common cold .
Conclusion
While COVID-19 and the common cold can look similar, COVID-19 is more likely to cause fever, cough, and loss of smell or taste, often without a runny nose or sore throat. The order of symptom appearance and the presence of anosmia are key differences. Over time, COVID-19 symptoms have shifted to resemble the common cold more closely, but loss of smell and taste remain important clues for distinguishing between the two illnesses Jacek2021Huart2020Hagemann2021+3 MORE.
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