As the coronavirus spreads around the world countries begin closing borders and restricting travel from February 1, 2020, except for their own citizens coming home. Mandatory 14 days quarantine was required upon entry in many countries. [1, 2, 3]
On February 1, 2020 Australia’s “National Security Committee of Cabinet (NSC) had decided, based on health advice from the CMO and AHPPC, to introduce strict travel restrictions on the entry to Australia of foreign nationals who were, on that date, in mainland China.” [5]
On March 20, 2020 President Trump baned non-essential travel between US and Mexico. [4]