Harris has threatened the U.S. may become the new epicenter of the global pandemic because of the very large acceleration of the new cases.
Indian Prime Minister Narendra Modi said on Tuesday the government would impose a nationwide lockdown from midnight for 21 days.
In North America, no country except the United States has more than 25 confirmed deaths or 1,600 total cases, according to the WHO. It has more than 46,500 confirmed cases with almost 600 deaths.
A person crosses a mostly deserted 42nd Street following the outbreak of Coronavirus disease (COVID-19), in the Manhattan borough of New York City, New York, U.S., March 23, 2020.
Britain on Tuesday began curbs on movement without precedent in peacetime after PM Boris Johnson ordered everyone to stay at home.
France is the only other European country with more than 350 deaths on Tuesday, according to WHO.
Globally at least 407,000 people have been infected with the virus.
The provincial capital Wuhan, which has been in total lockdown since January 23, will lift its travel restrictions on April 8.
However, the risk from overseas infections appears to be on the rise, prompting tougher screening and quarantine measures in major cities such as the capital Beijing.
Italy's 743 new deaths broke two days of successive declines that had taken the number down to 601 on Monday.
COVID-19 does choose anyone either your are rich or poor, young or old, healthy or not, everyone is susceptible to this virus most especially if the guidelines like proper social-distancing and to avoid mass gatherings will not be followed. On second place, China has recorded 81,171 cases of coronavirus infection while 3,277 people have died in the country due to COVID-19. Sixty-nine deaths were confirmed on Tuesday, bringing the nation's death toll to 471.
Harris was asked directly: "Do you see the United States going on to become the epicenter of this outbreak, overtaking Europe?"
Italy, with more than 6,000 deaths is still the world's coronavirus epicenter, but conditions are vastly improved in what had been ground zero - China.