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A comprehensive timeline of the new coronavirus pandemic, from China's first COVID-19 case to the present

The novel coronavirus that originated in Wuhan, China, in late December.

coronavirus covid 19 patient emergency workers protective equipment suits masks gloves south korea march 9 2020 GettyImages 1211268635
  • The virus is now known to have infected more than 240,000 people around the world and killed more than 9,800 of them.
  • The virus has also spread to about 160 countries and regions around the world in less than three months.
  • Here is a timeline of some of the most significant events and moments of the pandemic.
  • Visit Business Insider's homepage for more stories .
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Ruobing Su/Business Insider

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Though the first 41 cases were reported December 31, scientists determined that the virus could have started spreading from person to person as early as late November.

Case studies of how the virus has spread showed that the large gathering of people at the live animal market may have "boosted" the transmission of the virus among more people, researchers said .

Researchers think the new coronavirus originated in bats, then jumped to an intermediary species most likely pangolins , pigs, or civets that passed it to people. It can be spread among humans via respiratory droplets within six feet . The viruses can also survive for days on many surfaces.

The virus' pneumonia-like symptoms include fever and difficulty breathing.

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Photo by Noel Celis/AFP via Getty Images

Wuhan authorities banned the trade of live animals at all wet markets soon after the first cases. China also announced a temporary national ban on the buying, selling, and transportation of wild animals in markets, restaurants, and online marketplaces across the country a ban later made permanent.

Farms that breed and transport wildlife to wet markets were also quarantined and shut down.

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Viruses in the coronavirus family can cause the common cold, pneumonia, and SARS.

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Xiao Yijiu/Xinhua News Agency via AP

AP Photo/Gemunu Amarasinghe

A 61-year-old female tourist in Thailand was diagnosed on January 13. She'd recently spent time in Wuhan, China.

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Airports in Hong Kong, Singapore, Thailand, and South Korea also began to closely screen passengers for fever.

The man was evacuated from Wuhan, China, and landed back at the SeattleTacoma International Airport on January 15. Though he initially showed no symptoms, he reported to an urgent care clinic with symptoms of pneumonia on January 19. He was diagnosed with the virus a day later.

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Though Wuhan has a population of 11 million residents, population estimates for the surrounding province placed the full lockdown at 60 million residents. This made China's action the largest quarantine in history.

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The WHO's determination of "global public-health emergency" has been around since 2005 and been used only five times before .

Those five include the ebola outbreak that started in 2013 in West Africa ; another one that's been ongoing in the Democratic Republic of Congo since 2018; the 2016 Zika epidemic ; polio emerging in war zones in 2014; and the swine-flu pandemic in 2009 .

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LI WENLIANG/GAN EN FUND via REUTERS

Wuhan-based Li died a month after he sent out the warning message to other doctors, describing a cluster of patients with worrisome pneumonia-like symptoms at the hospital he worked at. Wuhan police had forced him sign a letter saying he was "making false comments."

Li caught the coronavirus himself after treating people who had it. Wuhan Central Hospital said at about 4 a.m. local time on February 6 that he died after "efforts to save him were ineffective."

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Li died February 7, leaving behind a son and pregnant wife.

After Li's death, Chinese social media was filled with outpourings of grief and anger. Many posts featured a hashtag saying "We want freedom of speech."

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The US citizen was 60 years old, according to the United States Embassy in Beijing, but little else is immediately known about the American.

Reuters

Both SARS and the new coronavirus come from the same family of viruses, and they share 80% of their genetic codes .

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SARS emerged in Guangdong and infected 8,098 people globally over the course of eight months from 2002-2003, killing 774. Just a month after the first confirmed case of the novel coronavirus, the total global case count surpassed that of SARS . On February 9, the death toll from COVID-19 in China alone exceeded the total number of people killed worldwide by SARS.

The new coronavirus killed nearly three times as many people in eight weeks than SARS did in eight months.

CDC

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"We had to find a name that did not refer to a geographical location, an animal, an individual, or group of people," WHO director-general, Tedros Adhanom Ghebreyesus, said in a press briefing.

WHO also wanted a name that was "pronounceable and related to the disease," he added.

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As China's number of new cases began to stabilize, South Korea's began to soar.

The Korean CDC believed that a 61-year-old female member of the controversial Shincheonji Church of Jesus , known as "Patient 31," triggered a "superspreader" event at the church's Daegu branch. She refused to be tested in hospital despite presenting symptoms, and coming into close contact with more than 1,000 churchgoers at several tightly packed services.

On February 23, South Korean president Moon Jae-in warned that the country faced "a grave turning point" in its efforts to contain the outbreak.

South Korea implemented widespread testing as a response measure. The country soon began conducting as many as 10,000 tests per day and built drive-through testing clinics that can detect coronavirus cases in just 10 minutes. Officials said the clinics reduced testing time by a third.

South Korea has tested nearly 250,000 people for the new coronavirus and confirmed more than 8,000 cases.

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Associated Press/Vahid Salemi

With about 18,400 confirmed coronavirus cases, Iran is currently the third most-affected country in the world outside mainland China and Italy.

All of the country's schools and universities closed down February 23, along with many movie theaters and cultural centers.

Neighboring countries like Turkey and Pakistan also closed their borders with Iran. Iraq has also imposed an entry ban on any incoming Iranians.

The country released 54,000 prisoners to prevent outbreaks in its prisons.

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According to Reuters , 23 members of Iran's parliament 8% developed the coronavirus, as well. One member, Fatemeh Rahbar, a conservative lawmaker from Tehran, died.

About 1,300 people have died.

The Iranian government has been accused of covering up the scale of the coronavirus and censoring the media's reporting on the outbreak. It also threatened the death penalty to those who hoard necessary materials or equipment.

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REUTERS/Flavio Lo Scalzo

The country's coronavirus caseload has skyrocketed more than 41,000 people have been infected and more than 3,400 have died. It has become the most-affected nation by the coronavirus aside from China.

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The US's first publicly confirmed death related to the coronavirus was a man in his 50s who had chronic underlying health issues. He died at EvergreenHealth, a hospital in King County, Washington.

The US has reported more than 13,000 coronavirus cases across all 50 states and Washington, DC. COVID-19 has also spread to Guam, Puerto Rico, the US Virgin Islands, and other territories.

More than 175 people in the US have died from the coronavirus , with Washington state leading the death toll. Due to its population density and cosmopolitan makeup, though, New York is soon expected to lead in cases and deaths.

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AP Photo/Andrew DeMillo

Nearly all US states have declared an emergency .

The strategic announcements can help states activate emergency response plans and spend more money on preparedness actions. Such declarations also authorize leaders to use funds to deploy additional personnel, buy equipment, and prepare stockpiles.

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Flavio Lo Scalzo/Reuters

Italy is the hardest-hit nation by the coronavirus outside of China.

The country initially saw two regions near Milan and Venice in the north become hotspots for cases, and locked down almost a dozen town in them on February 23, affecting an estimated 50,000 people.

The country's leadership shut down schools, museums, and public venues, and discouraged large gatherings.

On March 9, the government expanded the coronavirus restriction zone to encompass the entire nation. All stores closed, save for grocery markets and pharmacies.

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Salvatore Di Nolfi/Keystone via Associated Press

The WHO made the designation is based on the geographic spread of the disease, the severity of illnesses it causes, and its effects on society.

"Pandemic is not a word to use lightly or carelessly," WHO's director-general, Tedros Adhanom Ghebreyesus, told reporters at a press briefing announcing the determination in Geneva on March 11.

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REUTERS/Kevin Lamarque

President Donald Trump announced a ban on travel from many European countries and the US in response to the coronavirus outbreak.

The ban came into effect on March 13 night for 26 European countries. The UK and Ireland were later added. However, the ban does not stop US citizens and some other groups from entering the country from Europe.

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The ban has caused crowds and long wait times at airports across the country.

REUTERS/Jason Redmond

The declaration , made by President Trump, triggered the Stafford Act and allowed for more federal aid to states and municipalities. Trump said that his decision would open up access to $50 billion in aid money for US states and territories.

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Meanwhile, multiples outlets reported that Congress was working on a roughly $1 trillion stimulus package to boost the economy amid the pandemic.

Alfredo Falcone/LaPresse via AP

The Italian government has launched an all-out battle against its coronavirus outbreak: The entire country, home to over 60 million people, was put on lockdown .

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The New York Times reported it had seen a 100-page federal plan, marked "For Official Use Only // Not For Public Distribution or Release," to tackle the ongoing pandemic.

The plan's forecast was dire. As Business Insider's Rosie Perper wrote , the plan reportedly said product shortages could exacerbate the current situation, "impacting health care, emergency services, and other elements of critical infrastructure."

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It also allegedly said there may be "potentially critical shortages" of staffing, diagnostic capabilities, and medical supplies, including personal protective equipment and pharmaceuticals.

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