Through a process called statistical extrapolation. It is familiar to people skilled in said discipline. I am assuming US death count reported every day is accurate as opposed to China’s.
Its the 2020 Scamdemic! Destroy the economy and hope Trump loses in the fall.
This fake drama needs to be exposed and the authors punished, with extreme prejudice!
So us dummies can call it by it's street name, "SWAG" Scientific Wild Ass Guess".
Watch out, looking down your nose like that can cause a brain bleed out. That is a process familiar to people skilled in said discipline.
IE guessing.