Comparison of symptoms between covid-19
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COVID-19 Symptom Profile Compared to Other Viral Infections
COVID-19 most commonly presents with cough, fever, muscle pain, and headache, but sore throat and runny nose are less frequent compared to other viral illnesses like influenza and the common cold. Fever is more common in COVID-19 than in influenza or the common cold, while symptoms like headache, runny nose, muscle pain, and sore throat are much more frequent in influenza and the common cold than in COVID-19 or SARS. A greater number of general symptoms usually points to influenza or the common cold rather than COVID-19 .
Symptom Onset and Progression in COVID-19 vs. Other Diseases
The order in which symptoms appear can help distinguish COVID-19 from other respiratory diseases. COVID-19 typically starts with fever, while influenza often begins with a cough. Gastrointestinal symptoms, such as nausea or diarrhea, appear in a different sequence in COVID-19 compared to SARS and MERS .
Gastrointestinal and Digestive Symptoms in COVID-19
Gastrointestinal symptoms like diarrhea, abdominal pain, nausea, and vomiting are common in COVID-19. Patients with these symptoms may have higher levels of certain liver enzymes and are more likely to test positive for the virus in stool samples. They also tend to have a longer time before the virus clears from their system and may experience delayed diagnosis compared to those with only respiratory symptoms 36.
Neurological and Pain Symptoms in COVID-19
COVID-19 can cause a range of neurological symptoms, including loss of taste or smell, headache, confusion, dizziness, and muscle pain. Some neurological symptoms, such as fatigue and myalgia, can persist for a long time and are similar to those seen in chronic fatigue syndrome and other neurological disorders. More severe neurological complications, like stroke or encephalitis, are less common but can occur 48. Pain symptoms such as headache, sore throat, and muscle pain are more likely than chest or abdominal pain in COVID-19 patients .
Persistent and Long-Term Symptoms (Long COVID)
A significant number of people, including children, experience persistent symptoms after recovering from the acute phase of COVID-19. Common long-term symptoms include fatigue, mood changes, headaches, sleep disorders, and difficulty concentrating. These symptoms are more common and last longer in COVID-19 than in other non-COVID infections. The prevalence of these symptoms can remain high for months after the initial illness 210.
Symptom Severity and Disease Progression
Fever is the most common symptom in COVID-19, followed by cough and fatigue. Shortness of breath (dyspnea) is the only symptom strongly linked to more severe disease. People with existing respiratory conditions should be especially alert to this symptom .
Conclusion
COVID-19 shares some symptoms with other viral infections but has distinct patterns in symptom frequency, order of onset, and persistence. Fever and cough are common, but sore throat and runny nose are less so. Gastrointestinal and neurological symptoms are notable, and long-term symptoms are more frequent and persistent than in other infections. Recognizing these differences helps in diagnosis and management of COVID-19.
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