BEIJING -- Evoking bad memories of last year's outbreak, China announced Sunday it was investigating four fresh suspected SARS cases in its capital and ordered an affected southern province to gird for a coming holiday when millions of Chinese will be traveling.
All of the new suspected cases have been traced back to a single patient, the government said, suggesting the problem was still tightly confined and not a general outbreak.
Nevertheless, the announcement issued by the Ministry of Health on its Web site, was an alarming reminder that the disease that killed 349 people in China during last year's outbreak still poses a threat despite efforts by the government to prevent its return.
The latest four cases brought the total in China for the past week to two confirmed and six suspected. The new suspected cases are the father, mother, aunt and roommate of a 20-year-old confirmed SARS patient in Beijing with the surname of Li, the ministry said.
The other confirmed case is a 26-year-old medical student with the surname of Song in the southern province of Anhui.
SARS first emerged in southern China's Guangdong Province in November 2002. It triggered a global health crisis, killing 774 people around the world.
and infecting more than 8,000.
The Chinese government came under fire internationally for initially being slow to publicize information about the disease. It has vowed to be more open and, by many appearances, has done so.
On Sunday, the news provider Sina.com sent subscribers of its mobile phone news bulletin service a detailed itinerary of Song's recent travels, suggesting that travelers who may have come in contact with her seek medical evaluations.
The coming May Day holiday is a time when millions of Chinese travel within their borders on vacation. Many stream to Huangshan, a popular scenic mountain resort in Anhui, the province where one confirmed SARS case and one suspected death from the disease were reported Friday.
That got the attention of the province's Tourism Administration, which issued what it called an "emergency circular" on Sunday and called for "immediate action to prevent the spread of SARS." Provincial tourism offices were ordered to stay open "around the clock."
Beijing, China's capital, also reported one confirmed and one suspected case last week.
As it cautioned against panic, WHO agreed to dispatch a team of experts to help investigate links between a SARS research lab in Beijing and the severe acute respiratory syndrome cases being investigated last week -- two of which involved lab workers.
The workers became sick at the research lab in the Chinese capital, WHO said. And in what could be the world's first SARS death this year, Song's mother died last week in Anhui. Though Chinese authorities said she had a heart condition, WHO said she had "clinical symptoms ... compatible with SARS."
Song worked at the lab -- the virus control institute at China's Centers for Disease Control -- and is believed to have infected her mother after returning to Anhui.
Song was confirmed to have SARS and was treated last month at a Beijing hospital, where she came into contact with Li, the 20-year-old nurse who is also now a confirmed SARS case, the ministry said. A 31-year-old Beijing man who worked at the lab has been listed as a suspected case.
Song "has been recovering" and her temperature was normal Sunday, the official Xinhua News Agency said. It said her other vital signs, including breathing, have been improving.
The lab has been sealed off. Several hundred of its employees and people who had contact with the patients were quarantined in a hotel in Beijing's outskirts, state media said.