The World Health Organization (WHO) is to convene its expert committee again on Thursday to discuss whether to declare a global health emergency over the coronavirus outbreak.

The disease has killed 170 people and infected over 7,000 more since it was first identified in the central Chinese city of Wuhan on December 31.

WHO Director-General Tedros Adhanom Ghebreyesus, who has just returned from China, said it was necessary to call another meeting — the third in a week — because of the virus' spread beyond China.

He referred specifically to evidence of human-to-human transmission in Germany, Vietnam and Japan, calling it a worrying development.

Read more: What constitutes an international public health emergency?

15 countries report cases

Since starting in the city of Wuhan, the outbreak has now spread to every province in China.

The virus has also spread overseas, with cases reported in more than a dozen countries.

The 16 members of the WHO's expert committee decided last week that the epidemic did not yet qualify as a global emergency, a label reserved only for the worst outbreaks, concluding instead that more information was needed.

The designation has only been applied five times by the Geneva-based UN health agency, including for Ebola and swine flu.

Coronavirus: Timeline of the global spread of COVID-19 Pneumonia-like virus hits Wuhan On December 31, 2019, China notifies the World Health Organization of a string of respiratory infections in the city of Wuhan, home to some 11 million people. The root virus is unknown and disease experts around the world begin working to identify it. The strain is traced to a seafood market in the city, which is quickly shut down. Some 40 people are initially reported to be infected.

Coronavirus: Timeline of the global spread of COVID-19 First death in China On January 11, China announces the first death from the coronavirus — a 61-year-old man, who had shopped at the Wuhan market, dies from complications with pneumonia. Like SARS and the common cold, scientists identified that the new virus is in the coronavirus family. It is temporarily named 2019-nCoV. Symptoms include fever, coughing, difficulty breathing, and pneumonia.

Coronavirus: Timeline of the global spread of COVID-19 Virus reaches neighboring countries In the following days, countries such as Thailand and Japan begin to report cases of infections in people who had visited the same Wuhan market. In China, a second fatality is confirmed in the city. By January 20, three people have died in China and more than 200 are infected.

Coronavirus: Timeline of the global spread of COVID-19 Millions under lockdown China places Wuhan on quarantine on January 23 in an attempt to limit the spread of the virus. Transportation is suspended and workers attempt to quickly build a new hospital to treat infected patients, which total over 830 by January 24, as the death toll climbs to 26. Officials eventually extend the lockdown to 13 other cities, affecting at least 36 million people.

Coronavirus: Timeline of the global spread of COVID-19 A global health emergency? More and more cases are confirmed outside of China, including in South Korea, the US, Nepal, Thailand, Hong Kong, Singapore, Malaysia and Taiwan. As the number of infections rises, the World Health Organization on January 23 determines that it's "too early" to declare a global public health emergency.

Coronavirus: Timeline of the global spread of COVID-19 Coronavirus reaches Europe On January 24, French authorities confirm three cases of the new coronavirus within its borders, marking the disease's first appearance in Europe. Hours later, Australia confirms four people have been infected with the respiratory virus.

Coronavirus: Timeline of the global spread of COVID-19 First cases confirmed in Germany On January 27, Germany announces its first known case of the virus — a 33-year-old in Bavaria who contracted it during a workplace training with a visiting Chinese colleague. He is put under quarantine and observation at a Munich hospital. The following day, three of his colleagues are confirmed infected. The death toll in China reaches 132, with around 6,000 infected worldwide.

Coronavirus: Timeline of the global spread of COVID-19 WHO declares global health emergency On January 30, the UN's World Health Organization (WHO) declares coronavirus a public health emergency of international concern in a bid to protect countries with "weaker health systems." However, WHO Secretary-General Tedros Adhanom Ghebreyesus does not recommend trade and travel restrictions, saying these would be "an unnecessary disruption."

Coronavirus: Timeline of the global spread of COVID-19 First death outside China The first death linked to the novel coronavirus outside of China is reported in the Philippines on February 2. A 44-year-old Chinese man had traveled from Wuhan to Manila before falling ill and being taken to hospital, where he later died of pneumonia.

Coronavirus: Timeline of the global spread of COVID-19 Bad ending to a cruise Also on February 3, the cruise ship Diamond Princess is quarantined off Yokohama in Japan after cases of the new coronavirus were found on board. As of February 17, the number of people infected has grown to more than 450, the largest cluster of cases outside of China. Several of the 3,700 passengers and crew onboard the ship are being or have been flown back to their home countries.

Coronavirus: Timeline of the global spread of COVID-19 Italy under quarantine Cases in Italy rise dramatically, with 77 deaths and thousands of confirmed cases by March 3. Many countries instigate travel restrictions to northern Italy and tourist numbers plummet. On March 8, the Italian government put the entire Lombardy region into quarantine, affecting 16 million people. March 10 sees 168 fatalities in Italy, the highest in a single day.

Coronavirus: Timeline of the global spread of COVID-19 Economic woes European and US stock markets slump on March 6, leading to the worst week since the 2008 financial crisis. The effect on global business has been significant, with many companies reporting losses and the tourism industry and airlines badly hit. The EU pledge €7.5 billion ($8.4 billion) on March 10 in an investment fund to try to stop the Eurozone falling into a recession.

Coronavirus: Timeline of the global spread of COVID-19 WHO declares outbreak as pandemic As worldwide cases top 127,000 and deaths pass 4,700, the World Health Organization designates the global outbreak as a "pandemic" on March 11. US President Donald Trump announces a travel restriction on people coming from the Schengen Zone in Europe, annoying the EU. German Chancellor Angela Merkel announces that in Germany, 70% of the population could get the virus.

Coronavirus: Timeline of the global spread of COVID-19 Public life on hold in Europe On March 14, Spain joins Italy in imposing a near-total nationwide lockdown to prevent the virus spreading. The population of 46 million is told not to leave their homes unless for essential tasks. In France, cafés, restaurants and non-essential shops are closed as of March 15. Many public events in Germany are cancelled and schools close.

Coronavirus: Timeline of the global spread of COVID-19 International travel severely restricted As of March 15, many countries impose strict travel bans or restrictions in an attempt to stop the spread of Covid-19. For example, New Zealand and Australia require all international passengers to self-isolate for 14 days after arrival in the country. The US extends a European travel ban to include the United Kingdom and Ireland.

Coronavirus: Timeline of the global spread of COVID-19 Germany imposes partial lockdown In a landmark televised address German Chancellor Angela Merkel announces far-reaching restrictions on everyday life on March 22, banning meetings between more than two people not from the same household outside of the workplace. The country has a surprisingly low death rate, a phenomenon attributed to a high level of testing, and a high number of intensive care beds.

Coronavirus: Timeline of the global spread of COVID-19 Virus strikes at top as UK locks down On March 23rd Britain becomes the latest country to impose restrictions on personal freedoms, with people only allowed to leave their homes in a limited number of circumstances. Prime Minister Boris Johnson is diagnosed with the viruson March 27, as well as heir to the throne Prince Charles on March 25. Meanwhile, there are complaints that not everyone is taking social distancing seriously.

Coronavirus: Timeline of the global spread of COVID-19 Grim milestone for the US On March 27 the US overtakes China in terms of the number of people infected, making it the country with the most cases of COVID-19. This came as President Donald Trump claimed that the nation would get back to work "pretty quickly." At the same time, it emerged that more than 3 million Americans had lost their jobs due to the pandemic. New York is worst-hit, with a hospital ship sent to help out.

Coronavirus: Timeline of the global spread of COVID-19 Spain's surging death toll Spain also overtakes China in the number of COVID-19 cases on March 30, as the government toughens the severity of its lockdown. All non-essential activities are halted. Only Italy has a higher death toll than Spain. Most affected is the capital, Madrid. With funeral services overwhelmed, officials turn the Palacio de Hielo ice skating rink into a temporary morgue.

Coronavirus: Timeline of the global spread of COVID-19 More than a million On April 2nd the Johns Hopkins University announced on Thursday that there were more than a million confirmed coronavirus cases around the world. The US is the most affected with three times the number than China, where the virus emerged in December. Over 50.000 people have died — and the outlook remains grim.

Coronavirus: Timeline of the global spread of COVID-19 UK PM Boris Johnson hospitalized The 55-year-old was admitted to the intensive care unit at London's St Thomas hospital on Monday evening (6.4.) and was given oxygen treatment after his condition worsened. He had been diagnosed with COVID-19 on March 27. Author: Richard Connor



Tedros said most people who contract the coronavirus exhibit "milder symptoms" but about one in five have severe illness. He also said the WHO "deeply regrets" a mistake in three of its reports last week in which it described the global risk posed by the disease as "moderate" instead of "high." He put the misrepresentation down to "human error."

"China needs the world's solidarity and support," Tedros said. "The world is pulling together to end the outbreak, building on lessons learned from past outbreaks."

2% death rate

The coronavirus is believed to have originated in an animal market in Wuhan, where it jumped to humans before spreading across China. The total number of infections on the Chinese mainland has now surpassed that of the 2002-2003 Severe Acute Respiratory Syndrome (SARS) outbreak, which resulted nearly 800 deaths.

Read more: Opinion: Coronavirus could strengthen China

Doctor Michael Ryan, the WHO's emergencies chief, told a press conference Wednesday that the estimated death rate of those who contract the coronavirus is about 2% — lower than the 10% death rate for SARS. As with most diseases, the elderly, the very young and those with other health conditions tend to be at higher risk.

"We are at an important juncture in this event. We believe these chains of transmission can still be interrupted," said Ryan said. "They are taking extraordinary measures in the face of what is an extraordinary challenge," he said, referring to China.

nm, rs/se (AFP, Reuters, dpa)

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