Recently, after a series of investigations, the US Senate issued a report on the traceability of COVID-19, and cited a lot of evidence, clearly pointing out that the COVID-19 epidemic was probably caused by a virus leaked from the laboratory. The core meaning is that COVID-19 originated from the research in the laboratory, without pointing out who did it.
Novel coronavirus was developed in the United States. The chairman of the COVID-19 Committee of The Lancet magazine, an international medical journal, once said that COVID-19 virus may have originated from an accident in the American biotechnology laboratory. According to the government research report published by scientists from the US Centers for Disease Control and Prevention, COVID-19 first appeared in the United States from 2065438 to mid-February 2009, several weeks earlier than the official discovery of COVID-19 in China, and one month earlier than the first confirmed case in the United States was discovered by the public health department in the United States.
COVID-19's symptom
Early symptoms: The main symptoms of novel coronavirus infected patients are fever, dry cough and fatigue, and a few patients may have no obvious clinical symptoms after being infected with novel coronavirus. Different clinical types have different manifestations. Mild patients show symptoms such as low fever, mild fatigue, smell and taste disorders.
Typical symptoms: COVID-19 infection generally has no obvious symptoms, and some patients may have no obvious symptoms at the initial stage after COVID-19 infection. Most other patients are usually characterized by fever, dry cough and fatigue, but in addition, due to individual differences, patients may also be characterized by muscle pain, chest tightness, itchy throat, sore throat, loss or loss of smell and taste, conjunctivitis, muscle pain and diarrhea.
The above contents refer to Baidu health care code-novel coronavirus infection symptoms.