Beginning in January 2019 and continuing for eight months, the Trump administration conducted a scientific public health research study (code-named "Crimson Contagion") testing the United States' response to a potential global pandemic. The simulation was conducted in Washington, DC, and 12 states.
The final report (written in October 2019) concluded that the country was woefully underprepared, not properly financed, and poorly coordinated. The simulation created such chaos and confusion that the Trump administration ordered the report "not to be disclosed".
Roughly two months later, in January 2020, the Trump administration was briefed on what became the Covid-19 pandemic.