Perhaps, there wouldn't be the need for an investigation, so much because of Trump, there were people there.
March 25 2020
The Trump administration cut staff by more than two-thirds at a key U.S. public health agency operating inside China, as part of a larger rollback of U.S.-funded health and science experts on the ground there leading up to the coronavirus outbreak.
The Atlanta-based CDC, America’s preeminent disease fighting agency, provides public health assistance to nations around the world and works with them to help stop outbreaks of contagious diseases from spreading globally. It has worked in China for 30 years.
The CDC’s China headcount has shrunk to around 14 staffers, down from approximately 47 people since President Donald Trump took office in January 2017, the documents show.
“The CDC office in Beijing is a shell of its former self,” said one of the people, a U.S. official who worked in China at the time of the drawdown.
Separately, the National Science Foundation (NSF) and the United States Agency for International Development (USAID), the global relief program which had a role in helping China monitor and respond to outbreaks, also shut their Beijing offices on Trump’s watch.
Before the closures, each office was staffed by a U.S. official. In addition, the U.S. Department of Agriculture(USDA) transferred out of China in 2018 the manager of an animal disease monitoring program.