The United States' expected "export boom" to China in the aftermath of the Phase 1 trade deal will be delayed, as China battles the rapidly spreading coronavirus, White House economic adviser Larry Kudlow said on Tuesday.

Chinese factories, cities and transport links are shut as Beijing fights the spread of the virus, dampening domestic demand for everything from oil to consumer goods.

Under the trade deal, Beijing agreed to boost its U.S. purchases by $200 billion over two years, a massive increase that many analysts said was overly ambitious before the virus emerged.