White House trade adviser Peter Navarro listens to a news conference about a presidential executive order relating to military veterans outside of the West Wing of the White House in Washington, U.S. March 4, 2019. REUTERS/Leah Millis

WASHINGTON: White House trade adviser Peter Navarro on Monday (Apr 6) acknowledged that members of the task force dealing with the coronavirus outbreak clashed over the weekend about the efficacy of a malaria drug, hydroxychloroquine, for use against the disease.