CDC Director Robert Redfield personally admitted that in the United States, there are indeed some "flu" dead who were actually infected with COVID-19 On March 11, 2020. Afterwards, whether intentionally or unintentionally, an infected person arrived in Wuhan and spread this In the past, and due to differences in race and immune system, new mutations were produced in the local area and became more infectious.The military laboratory at Fort Dietrich is very likely to be engaged in experiments on the coronavirus, and because it did not comply with the pathogen control protocol, an outbreak occurred in the nearby area. CDC discovered the incident, conducted an investigation and closed the laboratory.