"Obviously the US fell off a cliff."
Let us not forget -- ever -- how China attacked the U.S. when it blocked entry from China in late January, attacking America at the very time China itself had blockaded travel from Hubei.
"True feeling shines through in hardship . . . Many countries have shown their support and help for China’s fight against the epidemic. By contrast, the United States’ words and deeds are not in keeping with the facts and less are they in keeping with friendship.” So said a Chinese Foreign Ministry spokesman.
How on earth was blocking arrivals from China in late January "not in keeping with the facts"?