BEIJING: A new coronavirus, a mysterious SARS-like disease, has spread around China and to three other Asian countries since first emerging in the central Chinese city of Wuhan.
A timeline of how the virus has spread:
ALARM RAISED BY CHINA
The World Health Organization (WHO) is alerted on Dec 31, 2019, by Chinese authorities of 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 suspected to be at the centre of the outbreak. The market is closed on Jan 1, 2020.
SINGAPORE STARTS SCREENINGS AT AIRPORT
On Jan 2, Singapore’s Ministry of Health (MOH) says it is aware of the pneumonia outbreak and is monitoring the situation closely.
Temperature screening will be implemented for all travellers arriving at Changi Airport from Wuhan and suspected cases will be referred to hospitals for further assessment.
On Jan 9, the WHO says that 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.
To date, 59 people have been infected, of whom seven are in a serious condition, according to an official toll.
READ: Wuhan pneumonia virus outbreak: What we know so far
Chinese health authorities say a first person has died of the virus on Jan 11. They revise downwards the number of sick people to 41.
SPREADS BEYOND CHINA
On Jan 13, 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 who was returning from a trip to Wuhan.
On Jan 15, 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.
On Jan 17, a second person, a 69-year-old man, dies in Wuhan, according to authorities.
The same day, the US Centers for Disease Control and Prevention (CDC) announces that it will begin screening passengers arriving from Wuhan at three airports: San Francisco, New York’s JFK and Los Angeles.
READ: Wuhan pneumonia virus casts shadow over Chinese New Year festival
HUMAN TO HUMAN TRANSMISSION CONFIRMED
On Jan 20, a third death and more than 100 new cases are announced in China, sparking concerns ahead of the annual Chinese New Year holiday which begins Jan 25 and 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. More than 200 cases have been recorded.
The virus is also detected in South Korea in a Chinese person who has arrived by plane from Wuhan.
China’s President Xi Jinping says that the virus must be “resolutely contained”, in his first public comments on the outbreak.
Human-to-human transmission is “affirmative”, a top Chinese expert on infectious diseases Zhong Nanshan tells state broadcaster CCTV.
COUNTRIES STEP UP AIRPORT SCREENINGS
Singapore’s MOH said on Jan 20 that temperature screening at Changi Airport will be extended to all travellers arriving from China.
Individuals with pneumonia who had travelled to Wuhan within 14 days before the onset of symptoms will be isolated in hospital.
On Jan 21, Australia announced it will begin screening passengers from some flights from China.
DEATH TOLL AT 6, MEDICAL WORKERS ILL
Wuhan’s mayor tells state television that the death toll has risen to 6.
According to state media, the number of infected patients has spiked to 291, a jump of more than 70 cases from the previously reported 218 patients.
It also confirms 15 medical workers in Wuhan have been diagnosed with pneumonia, with an additional worker suspected of having the disease.
Separately, China’s eastern Zhejiang provincial health authority said a total of five cases of new coronavirus were confirmed as of noon on Jan 21.
VIRUS SPREADS BEYOND ASIA FOR THE FIRST TIME TO THE US
On Jan 21, the CDC announced the US’ first case of the virus.
A US resident in his 30s who lives near Seattle approached authorities himself after reading about the SARS-like virus in news reports.
The man entered the country on Jan 15 after travelling to Wuhan, two days before the US began deploying health officials at major airports to screen passengers arriving from that central Chinese city which is at the heart of the outbreak. The efforts are to be extended now to a total of five US airports.