U.S. confirms its 8th case of coronavirus, quarantine in effect

(Reuters) - U.S. health officials on Saturday confirmed an eighth case of the fast-spreading new coronavirus in the United States in a person who had traveled to China.

The latest U.S. patient, who was not identified, is in Massachusetts, a spokeswoman for the U.S. Centers for Disease Control and Prevention (CDC) said in an emailed statement. The person recently returned from Hubei province in central China, the epicenter of the outbreak. No other details were provided.

The flu-like coronavirus, which is believed to have originated in a market that traded illegally in wildlife in Wuhan, the provincial capital of Hubei, has so far resulted in 259 deaths in China, the World Health Organization (WHO) said on Saturday.

All but one of the patients in the United States was believed to have contracted the disease while they were traveling in the Wuhan area of China. U.S. officials this week reported the first human-to-human transmission of the disease in the United States in Illinois.

Nearly 12,000 people have been infected globally, according to the WHO, with all but just over 130 of those cases occurring in China.

Concerns about the spread of the virus spurred the Trump administration to declare a public health emergency and bar entry to the United States of foreign nationals who have recently visited China. Despite that, U.S. health officials have said risks to the United States remain low.

In addition, U.S. citizens who have traveled within the past two weeks to Hubei will be subject to a mandatory quarantine of 14 days, believed to be the incubation period of the virus, officials said.

Americans who visited other parts of mainland China will undergo special health screening upon their return, followed by up to 14 days of "monitored self-quarantine," under the temporary restrictions.

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China coronavirus outbreak spreads across regions
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China coronavirus outbreak spreads across regions
A traveler wears a face mask as he sits in a waiting room at the Beijing West Railway Station in Beijing, Tuesday, Jan. 21, 2020. A fourth person has died in an outbreak of a new coronavirus in China, authorities said Tuesday, as more places stepped up medical screening of travelers from the country as it enters its busiest travel period. (AP Photo/Mark Schiefelbein)
A girl wearing a face mask sits among suitcases at Hong Kong International Airport in Hong Kong, Tuesday, Jan. 21, 2020. Face masks sold out and temperature checks at airports and train stations became the new norm as China strove Tuesday to control the outbreak of a new coronavirus that has reached four other countries and territories and threatens to spread further during the Lunar New Year travel rush. (AP Photo/Ng Han Guan)
Travelers wearing face masks gather at Hong Kong International Airport in Hong Kong, Tuesday, Jan. 21, 2020. Face masks sold out and temperature checks at airports and train stations became the new norm as China strove Tuesday to control the outbreak of a new coronavirus that has reached four other countries and territories and threatens to spread further during the Lunar New Year travel rush. (AP Photo/Ng Han Guan)
Staff in biohazard suits hold a metal stretcher by the in-patient department of Wuhan Medical Treatment Center, where some infected with a novel coronavirus are being treated, in Wuhan, China, Tuesday, Jan. 21, 2020. Heightened precautions were being taken in China and elsewhere Tuesday as governments strove to control the outbreak of the coronavirus, which threatens to grow during the Lunar New Year travel rush. (AP Photo/Dake Kang)
Peatones con máscaras de protección en una zona comercial de Tokio, el jueves 16 de enero de 2020. (AP Foto/Eugene Hoshiko)
Health workers wear protective gear Wednesday, Aug. 27, 2003, in Ward E3 of the Alice Ho Miu Ling Nethersole Hospital in Hong Kong's New Territories, where 24 patients were quarantined after seven of its health workers developed flu-like symptoms, although none have tested positive for SARS. According to a hospital spokesperson five nurses and two health care assistants working in the hospital's Ward E3 developed symptoms such as coughs, sore throats and fevers on Friday. Hong Kong's health chief, Dr.Yeoh Eng-kiong, said that preliminary test results showed patients' samples did not contain coronavirus that causes SARS and researchers are trying to identify the cause of the illness. (AP Photo/Anat Givon)
WUHAN, CHINA - JANUARY 21 2020: Workers monitor screens for fever signs on passengers detected by infrared detectors at Hankou Railway Station in Wuhan in central China's Hubei province Tuesday, Jan. 21, 2020. A new type of coronavirus has infected hundreds of people in the city.- PHOTOGRAPH BY Feature China / Barcroft Media (Photo credit should read Feature China / Barcroft Media via Getty Images)
WUHAN, CHINA - JANUARY 21 2020: Passengers wearing protective masks walk inside Hankou Railway Station in Wuhan in central China's Hubei province Tuesday, Jan. 21, 2020. A new type of coronavirus has infected hundreds of people in the city.- PHOTOGRAPH BY Feature China / Barcroft Media (Photo credit should read Feature China / Barcroft Media via Getty Images)
WUHAN, CHINA - JANUARY 21 2020: Passengers wearing protective masks walk outside Hankou Railway Station in Wuhan in central China's Hubei province Tuesday, Jan. 21, 2020. A new type of coronavirus has infected hundreds of people in the city.- PHOTOGRAPH BY Feature China / Barcroft Media (Photo credit should read Feature China / Barcroft Media via Getty Images)
WUHAN, CHINA - JANUARY 21 2020: Passengers wearing protective masks walk inside Hankou Railway Station in Wuhan in central China's Hubei province Tuesday, Jan. 21, 2020. A new type of coronavirus has infected hundreds of people in the city.- PHOTOGRAPH BY Feature China / Barcroft Media (Photo credit should read Feature China / Barcroft Media via Getty Images)
BEIJING, CHINA - JANUARY 21: Chinese travellers wear protective masks as they arrive to board trains at Beijing Railway station before the annual Spring Festival on January 21, 2020 in Beijing, China. The number of cases of a deadly new coronavirus rose to nearly 300 in mainland China Tuesday as health officials stepped up efforts to contain the spread of the pneumonia-like disease which medicals experts confirmed can be passed from human to human. The number of those who have died from the virus in China climbed to six on Tuesday and cases have been reported in other parts of Asia including in Thailand, Japan, Taiwan and South Korea. (Photo by Kevin Frayer/Getty Images)
YICHANG, CHINA - JANUARY 21 2020: Travelers wearing protective masks walk outside a railway station in Yichang in central China's Hubei province Tuesday, Jan. 21, 2020. China has stepped up the measures to control the spread of the new coronavirus that has infected hundreds of people in China.- PHOTOGRAPH BY Feature China / Barcroft Media (Photo credit should read Feature China / Barcroft Media via Getty Images)
BEIJING, CHINA - JANUARY 21: A Chinese girl wears a protective mask as her mother pushes her on a suitcase to board a train at Beijing Railway station before the annual Spring Festival on January 21, 2020 in Beijing, China. The number of cases of a deadly new coronavirus rose to nearly 300 in mainland China Tuesday as health officials stepped up efforts to contain the spread of the pneumonia-like disease which medicals experts confirmed can be passed from human to human. The number of those who have died from the virus in China climbed to six on Tuesday and cases have been reported in other parts of Asia including in Thailand, Japan, Taiwan and South Korea. (Photo by Kevin Frayer/Getty Images)
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The first quarantines of U.S. citizens potentially exposed to coronavirus in China began hours before the White House announcement on Friday.

Nearly 200 Americans evacuated earlier this week from Wuhan and voluntarily confined to a California military air base for 72 hours of health screenings were placed under a mandatory 14-day quarantine on Friday.

It marked the CDC's first quarantine order in 50 years.

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