The number of new coronavirus infections inside China - the source of the outbreak - was for the first time overtaken by fresh cases elsewhere yesterday, with Italy and Iran emerging as epicentres of the rapidly spreading illness.
Asia reported hundreds of new cases, Brazil confirmed Latin America’s first infection and the new disease - Covid-19 - was also detected for the first time in Pakistan, Sweden, Norway, Greece, Romania and Algeria.
US health authorities, managing 59 cases so far - mostly Americans repatriated from a cruise ship in Japan - have said a global pandemic is likely.
US President Donald Trump, seeking to calm markets and increasingly worried public, said in a live broadcast that the United States was “very very ready” to face the virus threat and that Vice President Mike Pence would be in charge of the national response.
It was one of just a handful of times that the president has appeared in the White House briefing room.
Stock markets across the world have lost US$3.3 trillion of value in four days of trading, as measured by the MSCI all-country index.
Wall Street reversed earlier gains yesterday afternoon and oil prices dropped to their lowest level in over a year, spooked in part by health officials saying dozens of people who had been in China were being monitored in suburbs of populous New York city - although no confirmed cases have been found.
New York Mayor Bill de Blasio urged the federal government to tighten testing for visitors from a range of countries where the virus has been spreading, adding that its eventual detection in the city was “100 percent certain.”
The virus that can lead to pneumonia is believed to have originated in a market selling wildlife in the central Chinese city of Wuhan late last year. It has infected about 80,000 people and killed more than 2,700, the vast majority in China.