That means fewer jobs and more debt. And the U.S. may be in for even worse.
The country's coalition-building power overseas has weakened as it focuses on crises at home, researcher Torrey Taussig says.
IMF economists talked to epidemiologists and tried to estimate how much COVID-19 restrictions will affect the economy.
The coronavirus outbreak's impact has already shown up in various parts of the economy.
While the U.S. waits on word of rate cuts, the global economy is seeing negative interest rates.
"Both sides should sit down and talk more," says David Lipton of the International Monetary Fund.
In setting U.S. monetary policy, the Fed is eyeing the global impact of trade wars and other economic troubles.
A conversation with the IMF's chief economist about the lowest global growth rate since the financial crisis.