The Wuhan coronavirus continues to spread at an alarming rate. More than 20,000 cases have been confirmed in China, with another 23,000 suspected. Many in China aren’t even being tested due to a shortage of diagnostic supplies. The true number infected is likely much higher than reported. The virus has turned up in 28 other countries, including the U.S. A pandemic seems inevitable.

The U.S. government has moved quickly to try to delay the spread throughout America. As of Feb. 2, most foreign nationals who have traveled in...