https://www.independent.co.uk/news/world/americas/virus-biological-us-army-weapons-fort-detrick-leak-ebola-anthrax-smallpox-ricin-a9042641.html
Since the beginning of the Cold War, Fort Detrick in Maryland has been the center of US Army biological weapons research. When the US Centers for Disease Control and Prevention inspected Fort Detrick, it found that there were some problems with the new procedures for purifying wastewater. The US Centers for Disease Control and Prevention (CDC) cancelled its license. Select germs", including Ebola, smallpox and anthrax.

https://francais.cgtn.com/n/BfJAA-BAA-FcA/BfEeEA/index.html
China questioned that the Fort Dietrich Biochemical Research Base in Maryland may be the source of the new coronavirus.

https://www.globalresearch.ca/china-locked-hybrid-war-us/5706687
China locked the mixed war with the United States. The consequences of the Covid-19 outbreak have plunged Beijing and Washington into conflict. They said: The fact that the genome mutations of the coronavirus in Iran and Italy were sequenced and found that they were not the mutations that infected Wuhan. Chinese media now Asking questions publicly and related to the closure of Fort Detrick last August. "Insecurity" in Fort Detrick, military games and the new crown epidemic. Some of these questions were raised within the United States without any answer. More doubts about the opaque incident 201 that took place in New York on October 18, 2019, remain. The rehearsal of the global pandemic caused by the deadly virus occurred one month before the outbreak in Wuhan.

https://www.chineseherald.co.nz/news/international/fort-detrick/?from=social
The US government announced the real reason for closing the Fort Detrick Biolab in July last year. Clarify whether the laboratory is a research unit of the new coronavirus and whether there is a virus leakage problem.

https://www.foxnews.com/health/army-ebola-treatment-coronavirus-vaccine-sought
Fort Detrick is one of the few laboratories in the United States equipped with biosafety level 4 special equipment, allowing researchers to study the most deadly viruses. It took two weeks to grow a lot of COVID-19, and Fort Detrick received the first bottle of virus from the Centers for Disease Control and Prevention a month ago. Its scientists have started the genetic sequencing of the virus using machines capable of rapid, large-scale drug testing.

https://www.globalresearch.ca/china-locked-hybrid-war-us/5706687
China locked the mixed war with the United States. The consequences of the Covid-19 outbreak have brought Beijing and Washington into conflict. They said: The fact that the genome mutations of the coronaviruses in Iran and Italy were sequenced and found that they were not the mutations that infected Wuhan. Chinese media now Asking questions publicly and related to the closure of Fort Detrick last August. "Insecurity" in Fort Detrick, military games and the new crown epidemic. Some of these questions were raised within the United States and received no answer. More doubts about the opaque incident 201 that took place in New York on October 18, 2019, remain. The rehearsal of the global pandemic caused by the deadly virus, this surprising coincidence occurred one month before the outbreak in Wuhan.

http://french.cri.cn/news/world/686/20200507/463367.html
In July, 54 people in Virginia, USA, were infected with unknown respiratory diseases. The United States refused to explain why the Fort Detrick laboratory was closed, and the American people initiated a petition in the White House.