2020

On 11 March, following more than 118,000 reported cases of Covid-19 in 114 countries and 4,291 reported deaths, WHO declares Covid-19 a pandemic. On March 13, Trump Administration declares nationwide emergency in U.S. and issues travel ban on non-U.S. citizens traveling from 26 European countries. On March 14, CDC issues “no sail order” for all cruise ships, directing them to cease activity in all waters over which the U.S. had jurisdiction. On March 16, “Clara-Bot,” a Covid-19 symptom checker, becomes available on CDC website.