< PREVIOUS SLIDE SLIDE 1 of 4 NEXT SLIDE > Residents leave the Hong Mei House residential building at Cheung Hong Estate as officials wearing protective gear stand guard outside the entrance, in Hong Kong's Tsing Yi area, China, on Feb. 11, 2020. © Billy H.c. Kwok/Getty Images

A hundred people have been quarantined in Hong Kong after being evacuated from an apartment building where two residents living on different floors were diagnosed with the novel coronavirus, authorities said.

During a press conference Tuesday, officials from Hong Kong's Center for Health Protection said the two infected residents were separated by 10 floors and the decision to partially evacuate the public housing estate in the city's Tsing Yi area was made after the discovery of an unsealed pipe in the bathroom of the lower apartment, raising fears about how the newly identified virus may have spread between the two units.

So far, at least five other residents of Cheung Hong Estate who showed symptoms of the novel coronavirus have all been tested negative for the illness, according to Center for Health Protection director Wong Ka-hing. If all tests return negative, Ka-hing said quarantined residents could be released by the weekend.

Faulty piping in an apartment block led to the infection of hundreds of people in the semi-autonomous Chinese city during the deadly SARS outbreak in 2003.

The global death toll from the new coronavirus outbreak -- 1,017 -- has already surpassed that of the SARS epidemic. All but one of the deaths have occurred in China. The only death from the outbreak outside of China was in the Philippines.

Since the first cases were detected back in December in the Chinese city of Wuhan, the epicenter of the outbreak, China's National Health Commission said Tuesday that it has recorded a total of 42,638 confirmed coronavirus cases. There are at least 319 cases confirmed in 24 other countries, according to the World Health Organization, which has declared the outbreak a global health emergency.

The number of cases confirmed in the United States ticked up to 13 on Monday, with another American diagnosed with the novel coronavirus in California, according to a U.S. Centers for Disease Control and Prevention spokesperson. The patient had arrived from China on the first evacuation flight to Marine Corps Air Station Miramar in San Diego. The flight landed at the military base on Feb. 5 and the passengers were to be quarantined for 14 days.

Other confirmed cases have been reported in the states of Arizona, Illinois, Massachusetts, Washington and Wisconsin. The CDC has shipped newly approved coronavirus tests to labs across the country so states can begin their own diagnostic testing instead of shipping all samples to the agency's headquarters in Atlanta.

Prior to Monday, the last confirmed coronavirus case United States had been Feb. 5 in Wisconsin.

Video by Reuters

Meanwhile, the Untied Kingdom's health department has declared the virus "a serious and imminent threat" and put new quarantine restrictions in place in an attempt to delay or stop the spread of the disease. Effective immediately, any individual public health professionals consider to be at risk for spreading coronavirus will be subject to a 14-day quarantine. Those restrictions only apply in England.

"I will do everything in my power to keep people in this country safe," British health secretary Matt Hancock said in a statement Monday, while announcing the new rules. "We are taking every possible step to control the outbreak of coronavirus."

The move came after a WHO news conference on Monday in which top health officials called reports of human-to-human spread of coronavirus in France "concerning." The transmissions, which occurred at a French ski resort, are worrying instances of "onward transmission from people with no travel to China," said WHO director general Dr. Tedros Adhanom Ghebreyesus.

"The detection of a small number of cases could be the spark that becomes the bigger fire," he added. "But for now, it's only a spark."

The WHO will convene in Geneva on Tuesday for a global research and innovation forum to identify the gaps in scientists' knowledge about coronavirus and to accelerate the development of interventions to stem the spread of the disease.

At the same time, an advanced team from WHO will begin its work in China. The international team will work with Chinese experts on the ground to investigate the origins and severity of the new coronavirus.

In Japan, thousands of people remain quarantined on the Diamond Princess cruise ship docked in the port of Yokohama since arriving there on Feb. 3. Among the 2,666 guests and 1,045 crew on board, at least 135 people have tested positive for coronavirus, including 23 Americans, according to a spokesperson for Princess Cruises, which operates the ship.

All those infected with the disease have been brought ashore for treatment, while the other passengers remain confined to their rooms on board until the quarantine period ends, according to Japan's Ministry of Health, Labor and Welfare.

U.S. citizens Mark and Jerri Jorgensen, who are among the passengers on board, said they feel "well taken care of."

"We're not stressing out too much," Jerri Jorgensen told ABC News in a telephone interview Tuesday. "We’ve got our medication. We got fresh linens for our beds. We’re not being left in the dark."

"It’s a serious thing, we get that," she added. "We are grateful that we’re being so well taken care of."

Princess Cruises announced Sunday that it is offering a full refund to all guests on board the Diamond Princess.

"They gave us a complete refund, airfare and a credit for another trip," Jerri Jorgensen said. "And people are like, are you going to cruise again? And the answer is yes, we’ve booked one for May."

ABC News' Jessica Mendoza, Erin Schumaker and Karson Yiu contributed to this report.