Mystery Virus ID Could Come Soon

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Hong Kong -- Health experts say they may soon identify the mystery virus that has killed dozens of people around the world. But a spokesman for the World Health Organization says finding a cure could take some time.

There's been a dramatic rise in cases of severe acute respiratory syndrome, or SARS, in Hong Kong.

Health officials quarantined a high-rise apartment building with more than 100 new cases reported among the residents.

The illness has prompted officials in Asian countries to impose quarantine laws, close schools and impose new health screening on travelers.

Canadian officials have declared a health emergency after another death was reported Sunday, bringing the death toll in Canada to four.

Officials have closed at least two hospitals to new patients, and hundreds of Canadians have been quarantined in their homes.