On Tuesday, Kamala Harris' chief spokeswoman Symone Sanders told reporters travelling on board Air Force Two that the US vice president is "well, all is fine" and that she is "looking forward to meetings in Hanoi tomorrow".

US Vice President Kamala Harris, who is currently on a tour of Southeast Asia, left Singapore for Vietnam almost three hours late due to concerns over an "anomalous health incident" in the Vietnamese capital. 

The US Embassy Hanoi said in a statement on Tuesday that "earlier this evening, the vice president's travelling delegation was delayed from departing Singapore because the vice president's office was made aware of a report of a recent possible anomalous health incident in Hanoi, Vietnam".

According to the statement, "after careful assessment, the decision was made to continue with the vice president's trip".