What are the symptoms of novel coronavirus?

The most unbearable thing is that COVID-19 has no obvious symptoms of fever and headache. In the early stage of COVID-19's post-infection disease, some patients may have no obvious symptoms. Most other patients are mainly characterized by fever, dry cough and fatigue, but in addition, due to individual differences, patients may also have symptoms such as muscle pain, chest tightness, itchy throat, sore throat, stuffy nose, runny nose, diarrhea and abnormal taste. These symptoms lack specificity and can be seen in many diseases. This is not unique to COVID-19, so it is actually difficult for patients to identify whether they are infected with COVID-19 virus by symptoms. When they have the above-mentioned performance and think that they have had contact with COVID-19 and infected people in the past, they should go to the fever clinic of designated medical institutions as soon as possible to make a clear diagnosis.

What are the typical symptoms in novel coronavirus? COVID-19's patients are mainly characterized by fever, dry cough and fatigue. Some patients have symptoms such as nasal congestion, runny nose, sore throat, loss or loss of smell and taste, conjunctivitis, muscle pain and diarrhea.

COVID-19 patients infected with Omicron vaccine have no obvious clinical symptoms and mild symptoms. The clinical symptoms of COVID-19's patients are mainly mild to moderate fever, dry throat, sore throat, stuffy nose, runny nose and other symptoms of upper respiratory tract infection. Mild patients may have low fever, mild fatigue, smell and taste disorders. No pneumonia. Severe patients often have dyspnea and/or hypoxemia one week after onset, and severe patients can rapidly progress to acute respiratory distress syndrome, septic shock, metabolic acidosis that is difficult to correct, bleeding and coagulation dysfunction and multiple organ failure. Very few patients can also have manifestations such as central nervous system involvement and ischemic necrosis of limbs.

It is worth noting that severe and critically ill patients may have moderate to low fever or even no obvious fever during the course of the disease. In addition to the above symptoms, there may be multiple system manifestations: changes in smell and taste. The first symptom of some patients is the loss or absence of sense of smell and taste. The World Health Organization (WHO) lists the loss of sense of smell or taste as a new symptom of novel coronavirus infection. Olfactory loss is a potential screening symptom, which helps to find suspected cases or guide isolation and protection.