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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.
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.
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.
People who experience a larger number of symptoms during the acute infection are more likely to develop long COVID, as well as people who require hospitalisation. [ 4 ] In children and young people, the risk factors for long COVID include female sex, older age, and pre-existing diseases or mental health problems.
“COVID rebound is a recurrence of COVID symptoms after initial improvement or a new positive test after a negative one,” Dr. Scott Roberts, associate medical director of infection prevention ...
Screening for COVID-19 in pregnant women in New York City, and blood donors in the Netherlands, found rates of positive antibody tests that indicated more infections than reported. [55] [56] Seroprevalence-based estimates are conservative as some studies show that persons with mild symptoms do not have detectable antibodies. [57]
As the new coronavirus spreads, doctors are seeing a pattern emerge in the way people are responding to the disease. People at first will experience mild symptoms like a light cough or headache.