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It is difficult to distinguish between symptoms caused by infection of the HCoV-NL63 virus and those caused by other common human viruses, making diagnosis and detection complex. Reverse transcription polymerase chain reaction of samples collected through nasopharyngeal swab is the most commonly used method for detection of the virus. [ 10 ]
The CDC notes that symptoms can last weeks, months, or even years after an infection, and that they may go away and come back. However, the CDC says, most people get better over time.
Temporal patterns of nasal symptoms in patients with mild severity SARS-CoV-2 Infection. American Journal of Otolaryngology. 2021. Headache as a Symptom of COVID-19: Narrative Review of 1-Year ...
Other symptoms are less common among people with COVID-19. Some people experience gastrointestinal symptoms such as loss of appetite, diarrhea, nausea or vomiting. [1] [65] A June 2020 systematic review reported a 8–12% prevalence of diarrhea, and 3–10% for nausea. [2] Less common symptoms include chills, coughing out blood, diarrhea, and rash.
[4] The symptoms included severe shortness of breath and physical weakness. The infection was contagious and virulent, easily transmitted through direct contact between chickens or experimental transfer of the bronchial exudates from infected to healthy chickens. The maximum mortality recorded was 90%. [5]
While new variants of SARS-CoV-2, the virus that causes COVID-19, have come and gone in the five years the illness has circulated the globe, its array of symptoms hasn’t evolved as swiftly.
The earliest reports of a coronavirus infection in animals occurred in the late 1920s, when an acute respiratory infection of domesticated chickens emerged in North America. [15] Arthur Schalk and M.C. Hawn in 1931 made the first detailed report which described a new respiratory infection of chickens in North Dakota .
But Russo says that XEC doesn’t have any major symptoms that are different from previous version of COVID-19. According to the CDC, symptoms may include: Fever or chills. Cough.