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TIMELINE: How the novel coronavirus developed

The virus first emerged in the central Chinese city of Wuhan in late December last year.

Medical staff in protective clothes are seen carrying a patient from an apartment suspected of having the virus in Wuhan, in Hubei province on 30 January 2020. Picture: AFP

PARIS - A SARS-like coronavirus has spread around China and three other Asian countries since first emerging in the central Chinese city of Wuhan in late December last year.

A timeline taking into account latest developments through to early Monday:

ALARM RAISED

The World Health Organization (WHO) is alerted on 31 December 2019, by the Chinese authorities to a string of pneumonia-like cases in Wuhan, a city of 11 million people.

Patients are quarantined and work begins on identifying the origin of the pneumonia.

The US Centers for Disease Control and Prevention (CDC) identifies a seafood market believed to be at the centre of the outbreak. It is closed on 1 January.

NOVEL CORONAVIRUS

On 9 January, the WHO says the outbreak in Wuhan was caused by a previously unknown type of coronavirus, which is a broad family ranging from the common cold to more serious illnesses like SARS.

FIRST DEATH

China says a first person has died of the virus on 11 January.

SPREADS BEYOND CHINA

On 13 January, the virus spreads beyond China's borders for the first time with a case emerging in Thailand, according to the WHO. The victim is a Chinese woman diagnosed with mild pneumonia returning from a trip to Wuhan.

On 15 January, China's health commission says no human-to-human transmission of the virus behind the Wuhan outbreak has been confirmed so far but the possibility "cannot be excluded".

The next day a first case of the virus is confirmed in Japan in someone who had stayed in Wuhan in early January.

Graphic explaining the transmission of a coronavirus from animals to humans. Picture: AFP

US CONTROLS

On 17 January, a second person, a 69-year-old man, dies in Wuhan and the CDC says it will begin screening passengers arriving from Wuhan at three airports: San Francisco, New York's JFK and Los Angeles.

HUMAN TO HUMAN TRANSMISSION CONFIRMED

On 20 January, a third death and more than 100 new cases are announced in China, sparking concerns ahead of the annual Lunar New Year holiday from 25 January which sees hundreds of millions of Chinese people travel nationwide.

The virus is present in Beijing in the north, Shanghai in the east and Shenzhen in the south with more than 200 cases recorded. The virus is also detected in South Korea in a Chinese person who flew in from Wuhan.

Human-to-human transmission is "affirmative", a top Chinese expert on infectious diseases Zhong Nanshan tells state broadcaster CCTV.

The following day sees the first case announced in the United States.

* Watch as China races to build 2 virus hospitals within days

WUHAN ISOLATED

On 23 January, trains and planes are no longer running in Wuhan and New Year festivities are scrapped in Beijing as the WHO declares an emergency.

On 24 January, China reports two deaths far from Wuhan and France confirms three cases - Europe's first.

56 MILLION PEOPLE CONFINED

On 25 January, Beijing orders control measures on public transport - Hubei province is all but cut off with more than 56 million residents confined indoors. Hong Kong declares a maximum health alert.

The next two days see Beijing suspend trips organised both at home and abroad and the first death in the capital. Germany and the United States advise against travel to China.

TRANSMISSION BEYOND CHINA

On 28 January, Germany and Japan announce the first cases of direct transmission outside China. The US begins development of potential vaccines. On 29 January, total registered infections surpass those of SARS as the first cases emerge in the Middle East. The WHO urges a global response.

The world indoor athletics championships scheduled for March in Nanjing are pushed back to next year and many sports events are cancelled - the Chinese football league is suspended.

REPATRIATIONS

Japan and the United States begin repatriations as airlines begin suspending flights to China. Several foreign companies in the world's third-biggest consumer market say they are suspending operations - Apple announces temporary closures of its Chinese stores.

RUSSIA SAYS SHUTTING BORDER

As France announces a sixth case, Russia says it will close its border with China.

EU TARGETS RESEARCH

On 30 January, the WHO declares a global virus emergency with the death toll having passed 200. In Britain, the first UK cases of the virus are confirmed, while Italy declared a state of emergency.

The EU says it is earmarking €10 million ($11 million) for research. The Pasteur Institute in Paris, along with Chinese and Australian researchers, isolates the virus culture - a major step towards eventual production of a vaccine.

FIRST DEATH OUTSIDE CHINA

On 2 February, the official toll stands at 304 deaths for more than 14,000 confirmed cases. Wenzhou, a city of nine million some 800 kilometres from Wuhan, becomes the second city to be locked down. Meanwhile, the WHO says the Philippines has reported the first virus death to occur outside China - a man from Wuhan.

On 3 February, it was announced that China's death toll from the coronavirus epidemic had soared past 360.
China says it will pump 1.2 trillion yuan ($173 billion) into the economy with the deadly virus expected to hit growth.

* Here's how you can track the outbreak of the coronavirus