The United States government is reacting to counteract the spread of the coronavirus outbreak: It will prohibit the entry of most foreigners who had visited China recently and would put some American travelers in quarantine for 14 days. The public health emergency was declared.
Temporary restrictions followed announcements by American Airlines, Delta Air Lines and United Airlines that they would suspend air service between the United States and China for several months.
The measure entered into force on February 4, 2020. The norm is part of the declaration of health emergency in the US because of the dangerous outbreak.
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Consequences
The interruption of travel caused shocks in the stock market and shook the industries that depend on the flow of goods and people between the two largest economies in the world.
Business planning was turned around in a broad global supply chain, from Apple to John Deere, the tractor company.
The S&P 500 suffered its worst loss since October, falling 1.8 percent, as the spread of the virus, and the increasingly urgent efforts of companies and governments to contain it, fueled fears of an economic slowdown.
