Jan. 21 (UPI) -- Chinese health officials said Tuesday a coronavirus has killed at least six people and sickened more than 300 as the World Health Organization called for an emergency meeting and confirmed it can be spread by humans.
The death toll rose to six Tuesday evening after the Wuhan Municipal Health Commission said a 66-year-old man and 48-year-old woman died Monday. Health officials said earlier the toll had risen to four.
China's Health Commission announced 291 confirmed cased of the virus, with 77 new cases reported on Monday alone. Municipal health commissions of Zhejiang, Tianjin and Shanghai reported additional cases, pushing the number of infections up to 302.
The number of confirmed cases in Hubei province, where Wuhan is located, has risen to 270; Bejing has five, Guangdong province 14, Shanghai six, Zhejiang five and Tianjin two.
Wuhan announced new measures Tuesday to contain the outbreak, including the cancellation of upcoming Lunar New Year celebrations.
The new measures follow President Xi Jinping ordering increased efforts to stop the spread of the disease Monday, but there are fears efforts to contain the virus impeded by Chinese bureaucracy have come too late. Hundreds of millions of Chinese are expected to travel across the country in the coming days ahead of the Lunar New Year, raising concerns of a potential increase in cases.
Health officials in Wuhan first confirmed it was treating patients suffering from pneumonia caused by an unknown virus on Dec. 31. Infrared temperature screening areas were installed in the city's airports and stations Jan. 14, according to state media.
The disease was soon identified as a coronavirus, similar to the one behind severe acute respiratory syndrome, or SARS, which killed hundreds of people in China in the early 2000s. It is believed to have originated from a now-closed Wuhan seafood market.
The new coronavirus has since spread throughout China with confirmed cases separated by nearly 1,500 miles in Beijing and Shenzhen. Confirmed cases have also turned up to hospitals in South Korea, Japan and Thailand with more than 100 suspected cases reported in Hong Kong.
In Australia, one man suffering from symptoms who recently visited Wuhan is under quarantine at his Brisbane residence as health authorities run tests to confirm if he is carrying the virus, Australia's ABC reported.
Fears over the disease's spread have been stoked following WHO's revelation that human-to-human transmission is possible after officials initially said it was believed to be transferable only by animals.
Zhong Nanshan, director of the Guangzhou State Key Laboratory of Respiratory Disease, said Monday night on state-run television the disease has been found in patients who lived hundreds of miles from Wuhan.
"Now we can say it is certain that it is a human-to-human transmission phenomenon," he said.
The way to battle the disease is to bar those with symptoms from leaving Wuhan, a city of some 11 million people and home to an international airport, he said.
"At present, there is no special cure for this new coronavirus and [we are] conducting some tests with animals," he said. "We expect the number of infected cases will increase over the Lunar New Year travel period and we need to prevent the emergence of a super-spreader of the virus."
Fifteen medical staff treating infected patients have been diagnosed, CNA reported. Airports in Asia, Australia and the United States have introduced mandatory screenings for passengers arriving from Wuhan and those who present pneumonia symptoms will likely be quarantined.
WHO Director-General Tedros Adhanom Ghebreyesus called for an emergency committee to convene Wednesday to determine if the outbreak should be declared "a public health emergency of international concern."