China has reported 5,248 of the world's 7,919 probable SARS cases.

All that doctors can rely on is the definition of a SARS case.

The one for a suspected SARS case does not include pneumonia.

No therapy has been shown to be effective so far in treating SARS cases.

The rate of new SARS cases being reported around the world slowed somewhat.

Canada now has identified at least 140 SARS cases, 15 fatal.

It remains unclear, officials say, whether the region has had even a single true SARS case so far.

The job of investigating potential SARS cases will most likely fall to local health departments.

Singapore reported no new SARS cases today, and one death.

Many SARS cases have occurred among health care workers, patients and visitors to hospitals.