The coronavirus crisis is showing how much the economies of the U.S. and China depend upon one another, despite the trade war.

Trade in medical supplies is vital. While China imports high-tech equipment, the U.S. imports a large quantity of labor-based products from China, such as masks, gloves and hand sanitizer.

That helps explain why shortages of some items in the U.S. are now even more acute than they were in China in January, when COVID-19 was raging there.

The shortages also reflect what Jia Yu, owner of an express shipping company in Flushing, Queens, is seeing in the goods customers send back and forth between the two countries.